I recently stopped taking my birth control and my period is getting off track. The first month after, my period was a little over 2 weeks late and then it was a normal period from there. This month, my period yet again was 2 weeks late but this time it's not normal. Not to be graphic but it's brown with small bits of red blood. I've been using tampons and it's all the same with it being brown. Is this normal after getting off birth control or should I go see a doctor?