Holy cramps, batman!

Emma
I switched from nuvaring to the pill (Sprintec) two months ago and ever since my periods have been wayyyy lighter, but my cramps have gotten significantly worse. I've tried Tylenol and midol and nothing has worked so far. I know a lot of people say potassium helps cramps, so they eat bananas. I'm allergic to bananas though. :( I'm about to start a 12 hour shift (I'm a nurse) and I can hardly stand up straight. Please help!