post menopausal endometrial lining 7mm

I just had a edometrial biopsy yesterday for a thicken endometrial lining of 7.2. I was having pelvic cramping but no bleeding. I have always had back problems so I didn't think much of telling the OBGYn of my recent leg pain radiating from my right buttock to my knee and sometimes to my calf as I went to the chiropractor and he said it was sciatica. But now I am wondering if it is related to the endometrial lining. My mother died of uterine cancer 2 1/2 years ago and it scares me to death. She had bleeding and kidney infections and I have none of that. Just pain in leg and occasional cramping. I am afraid that if it is cancer that it matastasized in the lymph nodes in my right leg. My endometrial biopsy won't be back for 3 weeks and I don't want to wait that long if it is cancer. Anyone know what I should do? My mom died because she was misdiagnosed with a kidney infection and then found out it was uterine cancer in June 2007 and didn't have a hysterectomy until November 2007 and it had spread to stage 4 she briefly had a remission but 2 weeks later in June 2008 it spread to her colon and passed away Sept 12, 2008. So I am very frighten of any delays in treatment if it is cancer