Tri-Sprintec and taking blood

I just started taking it a little over a week ago. My doctor seemed really half assed in prescribing it. She prescribed it to me stating that it would regulate my periods, which I haven't had in almost 3 months. I've taking blood tests, urine tests and am not pregnant, so she felt that birth control was the best option to make my period come back. I now know that there were many other options for "making my period come back". I have had a bit of a increased appetite with Tri Sprintec. The first day I took it, I felt like my head was going to explode. I was moody, on the verge of tears and had the biggest head ache ever. That was a little over a week ago. This is my 3rd day with the 2nd set of pills in the pack and I'm feeling really nauseous. My boobs are killing me. I can't afford to gain any weight and honestly, all these bad reviews are scaring the crap out of me.