You are not TS if you have not had any medical intervention, at this point you would only be TG if you are at all. Its not about just 'wanting to look like' another gender, its about being that gender. Do you want everyone to see you and treat you as a woman? Do you feel that inside you are female but your body does not reflect this? Does it feel wrong to be seen as your birth gender and it cause any kind of dysphoria? If not then its extremely unlikely you are trans* at all. An MTF is not 'becoming' a woman, they have always been female (talking about inside, not what their body looks/looked like) We change our bodies to match our inside so the world sees and treats us correctly. By doing this we are not just becoming that gender, we always have been. You can be a woman if you are one inside, your current body is irrelevant to that. If you do not feel like or want to be a woman then you need to seriously consider this. We typically all have varying degrees of dysphoria brought on by society treating us as something we are not
None of us want to be trans* anything, we have no choice in the matter. Thats the main misconception I hate the most from people who dont get this stuff is they think we choose this. We do not. I'd rather never have been born than had to live with this. The only thing we can do is deal with those who can help us, doctors, therapists and ultimately surgeons (if you need to go that far, I certainly do)
However the fact you even have these thoughts at all there might be something going on there that you need to further explore. I doubt the majority of people would suddenly worry they were TS so maybe you should talk to a gender specialist about it. Not just any therapist but someone who specifically deals with these issues to try help you find what is causing these thoughts. There has never been a single doubt in my mind I've known since before I was 5 that I was wrong. Now age 24 Im dealing with it, mentally getting worse every day as the wait drags on for something to be done.. Another problem with this stuff, it does not go away. Many try to suppress it for many years, maybe for times successfully but it will always come back eventually. For that reason I think its best to deal with it as soon as you can to prevent you having to go through that. The sooner the better as well as in terms of results. My biggest regret is not telling anyone sooner, I could have prevented the effects the wrong hormone had on my body but now its too late for that
No one can tell you who or what you are except yourself. Therapy and such can help you to get to the point where you are completely certain of it yourself though. Many seem to take a long time to come to terms with it and need exploration. I never did but thats not always the case. I knew from a very young age but thats not the case for everyone, some take a long time to realise it. I have never been female and wouldnt even know how to pretend to be. My body seems to dictate to people what I am but its them thats wrong not me. You need to think about how you feel as you are, if you're ok with being that gender. As said you dont just become another gender, you either are or you're not. If its simply about looks then maybe something like crossdressing would suffice your needs? I dont know anything about it as Im not one but they are fine with their birth gender and have no desire to change it
In either case it sounds like you need to think alot about it in terms of how you feel about yourself and where you want to be. Dont worry about being something you're not. Nothing wrong with being trans anyway, its only a label and I hate things being labelled all the time. All that matters is getting help if you need it or coming to terms with it either way to be comfortable with yourself. If you have any concerns regarding this then you should speak to a professional. I am not a doctor (yet, hope to be one day..) but they might be able to help you
Also on another note, gender is not binary. Everyone seems to think it is to force us into little boxes but its not the case. If you are fine with being male yet feel some female inside too might it be possible you could be genderfluid or someone who feels they are both genders? There are those who are neither, some inbetween, and those who change between both. If you are unsure of yourself then there is alot to take in. Unfortunately there is little education regarding trans issues so its understandable why some take longer to come to terms with everything. It wasnt hugely long ago that I realised everything myself and knew there was something we could do about it. Only you know how you feel. As you mentioned it may be a different issue which you are confusing for this. Either way it sounds as if you need to think on it and figure out what the issue is and deal with it as appropriate. It may be something else entirely but you should speak to someone about it if you are concerned