Pelvic Pain menstrual cramps blood clots

I am 34 years old I have had pelvic pain for the past 3 months constant the past 2 months during my period I have had biggish blood clots..this time round I still have the pelvic pain but I also have painful cramps I never normally suffer with cramps during my period so I'm freaking out abit.. I went to the doctors a couple of weeks ago and have had blood tests and had a smear done 2 months ago and currently waiting the results which are taking upto 16 weeks at the moment..last year I had a transvaginal ultrasound because of pelvic pain and everything looked fine..i read about endometrial cancer and it's really scared me..has anyone had anything similar?

It sounds like you could have endometriosis.

cancer is unlikely you should get another ultrasound