No history of ovarian cancer, just stressing about pelvic pain so much.. health anxiety may make this worse?

Be brave: You've asked and been answered before. Pelvic pain early without a mass is almost never ovarian cancer. I am going to trust you've had a pelvic exam, and if you have cancerphobia this severely, I wouldn't criticize your physician if he/she ultrasounded / imaged you. The key to overcoming this phobia is to act brave, resolve to be composed, perhaps a short course of CBT, ask your Dr.