hey bailee,
i sometimes get that too although i dont get cramps or bitchy, and i dont get it like a period.. i havent went to the doctors or anything cause i thought it might go away and it did for a few months but then it started coming back again. i dunno whats up but i thought i was the only one.
Sorry, but I'm really not quite sure what this is. I definitely think you should see a doctor though.