Are the other transfolks you know going to the same endo?
If they are, ask about their experiences and see if they can give any insight into how they got dosed the way they did, and if there is any detail of their medical history that differs from yours. If there isn't anything major, talk to your doctor the next time you go in and see what his issue is and why your dose has been what it is.
If they go to someone different, ask for a referral!
I know you said you hadn't taken your placement test yet, but I'm assuming that means you're admitted and have student status - have you looked into any of the campus health resources? Even community colleges usually have something on campus, even if it's just an office that refers to off campus resources.