From being off BC
Your cramping and bleeding is most likely from stopping the pill, obviously you should see your gyn and he or she can do an exam , blood work and an ultrasound to rule out any other causes.
If you are worried about becoming pregnant, you can still take over the counter morning after pill
like Plan B up to 3 days after unprotected sex
, and you can get a prescription pill Ella
one up to 5 days after.