Positive opk 3 weeks after miscarriage?

Emily

I posted in here a week after our miscarriage because I was showing positive opk. But turns out it only was because my pregnancy tests were still coming back positive. So we are now 3 weeks out. This is the lightest my pregnancy tests have been. Could this be a true positive opk or is that just leftovers from my miscarriage? I had a blood test last Monday and I was down to 59. I had another one today. Just waiting on the doctor to tell me what my number is at now.