A little word of warning on the BC pill, if I may...
(No, I'm not going to start foaming at the mouth and retelling my horror stories at the mention of the pill again, I promise
)If you find that your periods are heavier, more painful, more frequent - see your doctor. This shouldn't happen.
If you find that your body is changing shape, your skin is changing, you are losing body hair, you're growing tits, or you're otherwise feminizing like a MTF would - see your doctor. This probably shouldn't happen. You've got whack hormones.
If you find that you are experiancing massive depression and/or mood swings - STOP THE PILL AND SEE YOUR DOCTOR IMMEDIATELY. This should not happen. You aren't insane, the pill has been known to do that to some people. Sex is not worth your sanity.
Avoid anything with Cyproterone Acetate (Brenda, Diane, etc) - That's a testosterone blocker.
If you have reason to believe your T levels are high, or your hormone levels are otherwise a bit "abnormal", tell your doctor and excersize caution on the pill.
You may have to keep going back again and again for different mixes of the pill, and you may start to feel like you're annoying your doctor. Try not to worry about it, try as many mixes as you have to. It's your body, you live with it - not them.
Personally, I'd also give the doc a heads up on the GID. It seems relevent, considering you're about to start eating sex hormones. You don't want them to perscribe you anything with a T-blocker in it, and it'll give them more reason to listen to you if you start experiancing deal-breaking side effects (like mental ones).
Blood spotting, UTIs and thrush are very, very common in the first month or two of the pill. As is weight gain, fluid retention, and some bloating.
Sorry if I've scared you any

. The vast majority of people can take one varient or another of the pill just fine. It's just that the few percent that can't have a very, very bad time.