Menopause/pelvic pain

Hey everyone. 53 yo been in menopause for 2 years now, no menstrual cycle. For the last week I’ve had lower abdominal pain and lower back pain. It feels crampy and achy, heavy and is worse upon palpation. It does resolve somewhat with rest. No vaginal bleeding yet but it feels as though I’m about to get my period. Has anyone experienced this? I have a trans vaginal ultrasound scheduled for Thursday…but of course I’ve gone down the rabbit hole and am now in full blown anxiety mode ugh. I was also wondering about interstitial cystitis….I think I developed it over the winter after taking a medication that brought it on. I’ve been trying to follow the IC diet but it’s not helped. Grateful for any advice…thanks!