started my period on sept 16 & it ended on the 23rd. A few days later I had protected sex a couple of times a day also during the week my period ended. I'm also on birth control but I never take the pill at the same time b/c I forget. Today it's oct. 2 and I'm lightly bleeding with a little cramps. Could this be another period or implantation? I'm not sure if the condom broke I'm just freaking out..