What helps menstrual cramps?

I have been up all night like on the floor like crying it's soo bad!!!! i used to not have cramps and now it's ridiculous. my moms been through menopause so she refuses to buy things like midol and tampons for me because it's not necessary, this includes birth control. so i was wondering what things i could do to help, heating pads,stretching,walking,and tylenol aren't workin too great. any suggestions???