Isn't it illegal to fire someone because they're trans?
Whatever the case, it's really up to you. They say you should never work in a place you hate. So you basically have to make mental decisions as to if the pay is worth staying there for a long time, or if you just would rather be short time, and giving more time to be a girl, but of course less money that way. Perhaps you could get a second side part time job though. Otherwise, if you just really end up despising it so much, then I really recommend find a different job. It's not good to work where you hate.
(hehe. This was post 123. Now I need to get to 1234 XD)