bleeding 2 days post +ve opk

Hi 
Had positive opk on 12th Feb, another on 13th Feb, today negative again. Today have mild cramping on and off (general, not one-sided) and then red bloody discharge after bm this evening. I've never had ovulation bleeding before but I'm assuming this is what it is? Can anyone confirm or has had this situation? 
(Ps. This is my first cycle after a MC at 5 weeks if that might account for it?) 
Thanks!