Extreme abdominal pain and pressure

Yesterday it was so bad I had to take a hydrocodone. It came out of nowhere. I thought it was a really severe menstrual cramp at first, but it didn't let up like a cramp. It just stayed locked up and incredibly painful. I could barely walk. It lasted for about an hour. The hydro took the edge off, but the pressure was still there.

There is definitely something wrong with my insides. I have a gyno appointment in May, so hopefully I can make it til then without that horrible pain coming back.