Period started april 27 and lasted 2 or 3 days about 2 days later i took an opk it was positive had sex unprotected that night now having cramps and light pink spotting what's going on?

1st trimester bleeding: you need to see Gyn for proper evaluation. However, if you had positive test so soon after your abnormal period, you might already be pregnant since you're last normal period. Spotting at 5-6 gestation can happen from implantation of the embryo in the uterine cavity. You also might have a threatened miscarriage. The best advice is to see your Gyn for further evaluation , exam, QBHCG,TVS.