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The cause of your abdominal pain
above the pubic region can be due to infection in pelvic region;may be due to bulky uterus;infection of intestine that is lower bowel/rectum
but as the pain gets relieved it could be due to tenesmus
if the pain comes and goes on its own after some time and is better after passing stools or gas.This sort of pain if you have it could be due to infection of intestine for which you need to take antibiotics.The bulky uterus can be as a result of MA but there can be other reasons that need to be examined so please consult a Gynaecologist for examination and treatment.