Who’s prescribed you the antidepressants? You need to talk to them and explain that they aren’t helping, or that you need further help - intervention on your dysphoria, especially, if that is possible.
Emailing your professors would be…the best plan…but if you can’t come out to them I’m not sure what to tell you. You can at least explain to them that it’s depression/mental health preventing you from performing at your fullest - you wouldn’t exactly be lying.
I’m glad you’ve recognized that something needs to change, though. You need to see someone who can help you figure out strategies for your dysphoria, ways you can start transitioning if that would help, and medication that will work better for you. (If your meds aren’t helping, you should be on different meds, yeah?)
I’m sorry you’re in this situation, but know that we’re all here for you, okay? Stay strong. You are valid and your struggle is valid - you will get through this and we are behind you the whole way. <3