So after I got off BC combination pills last year, I got my withdrawal bleed and after that had a normal cycle with my period lasting 4-5 days. But the last 3months my period started out bright red, medium flow, for 2 days and then 3 days of brown discharge. I usually only had brown discharge the day after my period that lasted 4-5 days. I'm concerned my uterus lining isn't getting thick enough. I'm also going to take a pregnancy test tomorrow, just to see (i haven't taken a pregnancy test in over 4 months since I want to wait for AF to be late but she's shown up relatively on time every month except this month she was 2days late). My one friend had breakthrough bleeds throughout her whole pregnancy. I'm also seeing my doctor next week. Any ideas of what might be going on?