4 positive peak opks after miscarriage

So when I got pregnant a few months ago I had 4-5 days of peak (non flashing smile ) opks in a row using clearblue advanced. Now it’s happening again. I tested Thursday night, 2 weeks post d&c.; (The smile stays on the test for 48 hours.) I tested with a different clearblue opk yesterday and I had a solid smile. Again this evening (Sunday) I used a different clearblue advanced and had a peak day (solid smile). That’s 4 days!!! What’s happening? Could it be an issue?