I went to er and they found a ovarian cyst 2cm large. today i am experiencing horrible sharp lower back pain and nausea. should i go back to the er?

Yes: If you're experiencing horrible pain, i'm afraid the only answer can be yes, you should get it checked out.

Yes: If your symptom is getting worse, you should go back to er.

Only for pain relief: Follicular cyst, the most common type of ovarian cyst. In menstruation, a follicle containing the ovum (unfertilized egg) will rupture during ovulation. If this does not occur, a follicular cyst of more than 2.5 cm diameter may result. Treatment at home is warm bath tylenol/ibuprofen. 95% are benign. You may need to see a doc to get oral contracentives to manage it in the future.