Self-medicating = "Big mistake"
There are therapists out there who, after a few preliminary sessions probing your convictions, will put you on HRT as a diagnostic tool to separate the girls from the boys as it were. Basically, if you're not cut out to be feminized, you'll know it yourself within three to six months of starting the diagnostic HRT. But if you get 'hooked' on them, then that pretty much clinches the diagnosis of GID/TS. And the whole time, the doctors are watching over you, reading your lab reports, questioning you about adverse effects, and adjusting the dosage to optimum (with feminizing hormones/drugs, often too much can be much worse than not enough.)
There is one thing to worry about, though. The make-or-break event is usually when the estrogen and testosterone blockers shut down your pee-pee. That's right. Erections become difficult to attain/maintain, and orgasm becomes rare or non-existent. If you were meant to be female, this will be of no concern or maybe even a relief from an obsessive need. If you weren't cut out for womanhood, you'll want your functioning back NOW!!
Anyway, it'll pay to shop around for a therapist, or at least an MD who will take the time to study up on feminizing regimines, keep tabs on your health, and write you a 'scrip.
Don't do this solo!
Haz