Miscarriage and OPK's

So I had a miscarriage at 12 weeks on the 29th of June. We want to start TTC again so I decided I would start with opk's because I have no idea when I'm ovulating or when AF is showing up. I got 5 positives in a row and am wondering if anyone else had this problem. I don't think I'm actually ovulating, I think my levels just still may be high from the pregnancy. Anyone else have this happen?