Hello. I have had pelvic area pain that at times wraps around to my lower back. It is on my right side right on my panty line, in the center of belly button and vaginal area. It has been going on for over two weeks. I went to the e.r. last weekend and they did a C.T.. (per E.R. Doc) no kidney stones, not pregnant, nor tubal pregnancy, no gall bladder probs. The quickest appt. available with my o.b. is Monday.
Looks like your pain is more over related to lower back spine, disc as well the nerves coming out and going to legs from that level.  It can also be a simple nerve trade under the gluteus muscle, and we called it as sciatica.  I suggest to use hot and cold pack at your painful part back and buttocks frequently in a daytime and check for result.  It should give you some relief.  As well, I also suggest meeting an orthopedic and if needed to do MRI of back.  Which will reveal if there is any issue at back spine.  Later we can plan treatment as per the report.  Till then use hot and cold pack.  Take care.