I m taking tri-previfem and have been taking it for just about a year now. On my last week of pills (period week), I had Un protected sex with my fiance.and now I m on the beginning of a new pack and my period was supposed to stop already but now that I am on the third pill it has returned(lil bit of spotting with a very light flow). Is it just the pills and my body adjusting again? I have not had this happen before...