Okay so I got my period two weeks ago and it was a regular period they’re usually four to five days but after a week of not bleeding I woke up and there was dark brown blood like deep dark brown so I thought okay? So it went on for about a week then it stopped the day it stopped I had sex and we used a condom it slipped off twice but I’m on the pill so I’ve been taking it regularly like I’m supposed to after about two days of no blood here I am again having dark brown blood again and I’m concerned because I’m cramping and my back is hurting but that is the only pain I am experiencing should I go talk to my doctor?