I've got pain in my lower abdomen and lower back. my mom tested my urine with strips it was ok. what could this be? i'm on bc and don't have a period.

Musculoskeletal: Absent an infection, the pattern of lower back and abdominal discomfort suggests that the muscles and ligaments might have been stressesed, and in sufferers mechanical activities that are being pursued should be evaluated for repetitive or acute stressors. A new regimen of exercise can arouse unique discomforts; until the body grows stronger and adjusts.