Uterine/Pelvic pain 2 months after D&C and Right Ovary removal?

I have always had heavy abnormal bleeding, but never with cramps or pain. When my right ovary twisted due to a large cyst, my gyno removed my right ovary and fallopian tube because it had already set up gangrene. He also did a D&C at that time to see why I have such abnormal periods. After D&C I began cramping and bleeding horribly. My gyno administered a depo-provera injection and period went away. Period came back while on the shot and I get a breif pain/cramp when a blood clot comes out. My general doctor wants to send me for a transvaginal ultrasound, however I just had one 2 months ago before surgery and it was quite painful for me and do not want to go again. What should I do? could the d&c be the cause for the pain even now 2 months down the road? Additional info is that I still have a large cyst on remaining ovary, but gyno left the ovary in so that I can hope for children one day.