Hi confused, welcome to Susan's. As Janet said, you're safe here and among family. Hopefully we can help you along your own path towards not being "confused."
First, I would like to say that I don't think it's fair for your doctor to be pushing you to make a decision like this so quickly. I mean, you just found out that you have this, and it doesn't sound like you've had much time to digest it. Unless there is a medical reason to make an immediate decision, i.e. your life is threatened, then you should take the time to make the right choice for you and no one else, because HRT and gender surgery are irreversible and permanent.
Second, yes, this is very scary, and at times difficult for all of us. Believe me, I may not be in the same situation as you are now, but there was a time early on when I was scared out of my mind. But, I took the time, searched inside myself to find the right choice, and once I made that choice I did what I needed to, and I didn't let anything get in the way. Today, I'm living happily as a woman and accepted by those around me. There's still some issues to work on, but I'm pretty much through the woods. I'm sure you will get there too, as many of us have.
Yes, some people will react badly if you decide to be a girl or boy, and you just need to ignore them. Others will support you whatever you decide, including us here and those around you that really care for your well-being. It sounds like your family is supportive, since you said you have been "acting" like a girl around the house.
Please check out the Wiki here on Susan's for links to more information to help you in your decision. Also, two sites that really helped me out are Andrea James'
TS Roadmap, and Lynn Conway's website:
http://www.tsroadmap.com/index.htmlhttp://ai.eecs.umich.edu/people/conway/conway.htmlBest of luck hun! Let us know what's going on, and like I said, we'll try our best to support and guide you.