I got the test results back. Turns out, I have endometriosis. Because the it had grown into some of the muscles of my back, there is a high probability that all of it wasn't removed and that it could grow back. I was referred to a gyno who gave me one of two options, a shot that would basically put me in early menopause or to be on the pill until I reach menopause. I choose the pill. There were a lot of possible side effects from the shot- weakened bones, hot flashes, etc- that to be honest, kinda freaked me out. I have been on the pill before and know how my body reacts to it, so I felt more comfortable with that option.
I will have to have periodic check ups and blood tests (there is something in the blood- a marker? a chemical?- that increases with the growth of endometriosis), but hopefully I should have less pain.
Thanks everybody for your prayers and concern. It is really appreciated.