So I've been off my period for a full day and I've had like a slight stomach virus for like 2 days and today I felt OK and I went to work and when I got home and went to the bathroom I had this brown discharge and it was a lot so I got in the shower and it was flowing so when I got out I put a tampon in but it felt weird so I took it out and it had some brown stuff on it and recently I just started birth control(Sprintec) so I don't know if that's throwing it off or should I be worried