How to fight internalized transphobia

I think I've been a trans woman for 10 years now. Every single day I dream of being a woman, but I have so much internalized transphobia that I keep thinking I'll be a man my whole life.

I grew up in a pretty transphobic environment, and now I'm 26 and it feels impossible. I feel ashamed of having these thoughts. And I'm not doing anything to get better.