GENIANI Back Pain & Relaxation Gifts for Women – Electric Heating Pad for Back, Neck & Shoulders, Soft Microplush Electric Throw Heating Pad for Period Comfort, Fast Heating, Auto Shut Off, 12"x24"

Heating pads and a safe combination of Ibuprofen/Tylenol usually work for me! If you can afford it, lots of stores online and in person (usually pharmacy/health section) carry plug-in heating pads so you don't have to get up and reheat the pad all the time, which I find really nice (Example here). Also, really bad cramps might be something to mention to a trusted doctor. They don't mean anything is wrong, most of the time that's just how the body is, but it's just good for your primary care provider to know about!