I don't really know how to start this off but I am desperate and In need of some advise/knowledge from anyone. My boyfriend and I have been sexually active for about 3 months now but haven't had sex for the last 3-4 weeks. My period was late just by a couple of days and when it came it was brownish and only lasted half a day and I'm not too sure why. we only have had protected sex using condoms and sometimes the pill. My boobs have been very sore, I'm in the washroom a lot and I'm very worried about being pregnant but I don't see how I could be if I was being safe. I NEED HELP