I'm very concerned and worried that I am pregenant. I take birth control regularly. However my boyfriend and I aren't always the safest with condoms and occasionally have unprotected sex usually with withdrawal however that sometimes fails. last month when I was due for my period I also had a UTI and was prescribed bacterium. I got my period when I was suppose to but it was much lighter then normal and only last for a day and a half compared to the normal 3-5 days. I took two at home tests both showed negative. My boobs have been super sore and feeling heavy but not tender to touch. And other things such as slight nausea here and there and cramps like I'm getting my period. Am I pregenant or was this a fluke and a mix of the Bactrim cause this. Again very nervous. Please help in any way.