I've been on bc for three years. On April 30 my bf and I had protected sex for the first time in a while. It only lasted about a minute and he wore the condom correctly and he pulled out. The next day, may 1, I started wiping and it was light pink/brown. Around may 3 it started getting heavier like more red and continued to decrease until may 6 and when I wiped there was small specs/streaks of blood. I am now supposed to start my period tomorrow and I took a pregnancy test 6 and 5 days before my period and they were both negative. But I know it was too early to tell. I'm really nervous because I wasbleeding and now I'm getting milky white discharge but we used all the right precautions. Could this be a side effect of bc or stress. I just had finals and now I've been stressing about being pregnant. Could it have been implanation bleeding? And is this type of discharge common before periods?My boobs have been sore and I've been having mild cramps. Someone please help. If you don't think I'm pregnant what could the spotting be? I also started an antibiotic the day after we had protected sex. Could I have gotten pregnant from the day before since antibiotics mess with bc?