Ok so I got my period April 25 and it lasted till April 30th. On May 1 I was dry humping with my boyshorts on, he was naked. We did not have sex. I noticed I had some brownish colored blood starting around May 11 and it lasted until May 14th. I am not on birth control but usually I am pretty regular and I am due to get my period around now. I was wondering if you guys think that that brownish blood I experienced could have been implantation bleeding? I have heard that implantation bleeding doesn't last that long, nd I know the chances of getting pregnant through dry humping are slim especially because he did not finish but I tend to be a paranoid person. Additionally, I was working out, running at least 5 or 6 miles a day, but stopped early May due to finals and such so I was told that the blood could have been from a change in exercise and also because I was taking antibiotics. I plan on getting a test sometime today but in the mean time if anyone could share their thoughts I'd really appreciate it.