Nearly positive OPKs pregnant already?

So does anyone have any experience with being pregnant and days of near positive OPKs?

I miscarried July 21st. I waited a week and a half and starting using OPKs to track ovulation. I haven't gotten a positive yet and tomorrow will be 4 weeks. However, the last 5 days I have had near positive OPKs which has never happened to me before. They were always super light before. I did some research and the OPKs can pick up both LH or HCG. Now I'm wondering if I may have missed my ovulation and am pregnant. I have been cramping for about a week and have gotten migraines again. I'm just terrified to take a pregnancy test.