I am soaking thru tampons at times within a 30 minute time interval. I have normal pap smears. Cramps are compareable to labor pains! Is this mormal?

Heavy periods. Heavy bleeding may not be normal. See your family doctor or gynecologist as this can lead to anemia if not addressed.
BLEEDING. It looks like you have abnormal uterine bleeding. Many conditions can cause your problems including hormonal imbalance, benign conditions like polyps or fibroids, or gynecologic conditions like endometriosis or adenomyosis. Depending on your age, fertility status and medical condition you have several options for diagnosis and treatment. See your local gynecologist before it gets worse.