The only way to exactly know the cause of your cramping would be to wait for your cycle and get a trans-vaginal sonogram. If you miss your period, you can suspect pregnancy
and confirm it either with a home pregnancy test done 3-7 days after the expected period or a blood test
and a trans-vaginal sonogram. Hyper-stimulation of the ovaries occurs while on ovulation induction
formation is a possibility; in such a situation you would have a persistent pain along with bleeding disturbances sometimes. Please see your doctor for further support. Wish you good health.