Ok so this may seem TMI, but three days ago, my boyfriend and I had sex ( with condom, and without) and yesterday and today I have had the trademark pregnancy symptoms. Nausea, peeing a lot, over emotional, increased appetite, and headaches, but I thought pregnancy couldnt happen that fast. I changed my birth control pills the same weekend, and this morning and afternoon I have had a brown discharge show up in my panties. My period isn't due for a week. Someone help!