I've never had issues with cramps, however these last two periods I've had debilitating cramps but only at night. Should I be worried?

Lots of options. You will need to see your obgyn for an exam and testing. Depending on your age and fertility plans there are lots of treatment options. Birth control pills can regulate, shorten and lighten your cycle to help with cramps. Mirena (levonorgestrel) iuds can minimize your periods. Lysteda is a great new hormone free drug used to stop heavy painful periods.