Sounds like a cyst to me, or maybe endometriosis. The other thing that pops into my mind is maybe pelvic inflammatory disease. Call a doc, and get it checked out either way. Cysts are easy to deal with - most of them go away. The other two are harder - endo is forever pretty much, and PID needs to be treated immediately as it can lead to infertility. Do you have a fever or anything? Or discharge? I would call your doc today and get an appt ASAP.
[This message has been edited by jessilynn68 (edited 07-31-2003).]