I had protected sex with my boyfriend on the 21st of april and on the 25th of april in the evening i had bleeding. But my period just came in on the 1st of april and lasted till the 5th so the next one isn't due till the 5th of may atleast as i generally have a 27 day cycle. Can anybody tell me what this bleeding could me as im extremely paranoid after reading up a lot of stuff about implantation and everything pregnancy related available on google. Please please please help