Hi my dear :)

yes your boobs will definately be quite a bit sore from the pill, and they may even grow.(which many women like)

it is safe to have unprotected sex when you are on the pill pregnancy wise, but because you are so young you may want to be extra careful. You said std's are no problem, so maybe a spermicide lubricant to give you an added piece of mind.

*** try and not miss a pill! Take it everyday as close to the same time as possible.

***antibiotics interfere with the pill..Just a side warning..

I always tell people to set an alarm on their cell phone to go off every day if they have trouble remembering...I never missed a pill that way!

Remember that stds can take a couple of weeks to a few months to actually show up on a test. If you are not using condoms you might want to get tested every 3 or 6 months just in case!