pretty bad cramping and Last month I had no period.

Hi,
Welcome to ehealthforum,
The symptoms could suggest possibility of breakthrough bleeding, implantation bleed (if you had been sexually active without additional protection, or if you were not regular with pill intake, or due to chances of contraceptive failure). Wait and watch for your periods/withdrawal bleeding. If you miss your periods, or if you get abnormal bleeding, or if you develop any new symptoms, visit your doctor/gynecologist for further evaluation and assistance. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.