This is the third time I ve had sex ever. I lost my virginity about a month ago and had sex three times since. Since I ve lost my virginity my period was on a day or two early but nearly on time, I was a bit light and then heavy for two days and then consistently there for the rest of the period but not what I m used to. I had sex once protected after the first period (my third time), my next period came and it started like it always does very bright red and a bit of a little puddle but then the next day it was light (and brown and it has never been brown before) way more than usual and was for another day to the point where I thought it might end soon then it was a lot the next day like a puddle and bright red again. Then it was a combination of red and brown the next day and light then by the end it ended like it usually did. Is that wrong? Is this really implantation bleeding or did having sex make my period lighter? It seems like that is the case but I could be wrong. What s going on?