I've had pain in my lower right abdomen for 2 months, was checked for appendicitis and gallbladder issue which were normal. had ultrasound of uterus, also normal. recently noticed blood in urine but only sometimes?

Any abnormal bleeding, including blood in urine warrants an evaluation. Visit this site for info and talk to your doctor: https://www.niddk.nih.gov/health-information/urologic-diseases/hematuria-blood-urine#:~:text=Points%20to%20Remember-,Hematuria%20is%20the%20presence%20of%20blood%20in%20a%20person's%20urine,see%20it%20under%20a%20microscope.

Please see a Urologist who will do appropriate exam and tests to find cause. Drink plenty of water