Hi I'm new to this so here goes , had sex with my bf 3 days before my period then it came 2 days later than normal and it only lasted 3 days then 2 days later I had a small amount of light pink blood , then had sex a day later then had the same , I've taken 2 pregnancy test which both were negative I'm not due on for another 18 days but I've been over emotional crying about everything headaches and cramps and this when I wiped does anyone think it could be IB or something else , thanks in advance .Ami