Hi everyone I'm Naomi

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So I'm still very new to everything, but I'm having a really rough time and would like to see if anyone had any thoughts, or is / or knows someone who went through something similar. I'm currently 21 and I think I'm experiencing gender dysphoria to the point where it is interfering with my ability to function normally in day to day life mainly due to anxiety, trouble sleeping, and downward mood swings. I'm currently seeing a therapist at my school who specializes in transgender issues and at the moment I want to start HRT ASAP and make my body both feel and appear feminine. However, one of the issues that I'm having in convincing my parents, is that this constant intense sense of dysphoria came on comparatively suddenly. By that I mean that by 15 I was definitely having sporadic thoughts about being female and a desire to be female but they were infrequent and easily brushed off as something I thought to be impossible. These had been increasing in frequency as I got older and over the last year I have had sporadic instances of feeling really down/ depressed and honestly started to wonder if I might be trans. Well 7 weeks ago it was like a switch flipped and I had the worst week of my life in terms of feeling sad and confused, but by the end of the week and after talking to several people in the GLBT community at my college I was pretty sure that I identify as female mentally and in my heart.
Well it's been 7 weeks now with a constant state of identifying as female, and to help improve my mood I shave most of my body hair and all of my facial hair, and I now exclusively wear panties and a bra for underwear. I'm also currently growing my hair out (something I've wanted to do for a really long time) and I'm looking into electrolysis to get rid of my facial hair. I hate seeing myself in a mirror or pictures (never really liked pictures of myself since I was like 8 ) and I often feel various levels of negative attitudes toward my genitals ranging from annoyance to self disgust for touching them. I also have trouble not thinking about the fact that I don't feel right and it's really distracting. Despite all this I don't want it to stop experiencing this and go back to identifying as male, I really want to be seen as female since my mind is absolutely sure that I am female.
As I said though my parents are concerned that it's something other than gender dysphoria because of the sudden switch in intensity and because I am attracted to women. I haven't been able to ask my therapist about this yet and I'm really concerned because with pretty much everything I've read it always seems like people knew for years that they identified with the sex opposite their genetic sex and I haven't really seen anything about someone who had a very rapid onset of dysphoria.
I really hope this doesn't sound desperate lol, I don't mean to be that way.