Hi
Welcome to the MedHelp forum!
Pain in the lower abdomen, pelvis, and vagina can be due to infection, pelvic inflammatory disease, UTI, STD, uterine fibroids, urinary bladder infection or cystitis. If you do not have any discharge and there is no other symptom then it can also be due to pinched nerve (either pudendal or spinal). These conditions are broadly classified as chronic pelvic pain syndrome. The intensity of pain depends on the degree of inflammation and thus compression. This can vary.
Do discuss this with your gynecologist and get yourself examined. Take care!
This may be the stomach's response to the decay of the body (after having 5 children) or the body's tired response to harm.