Hi everyone. Im new to the forum. I had a flare up for the past month or so. I went from absolutely no crohns symptoms to having cramping diarrhea not too bad though. I am on birth control and missed my last period (three weeks late now). My periods were always very regular. I took too pregnancy test- both negative. I was wondering if this is normal? To miss a period during a flare up even when on birth control?