I’m 27 weeks 3 days with twins. Last night I had a lot of Period like cramps in my lower back and I was just taking a nap and the cramps were so bad it woke me up but this time it felt different, the pain wrapped around my belly and back and was like a consistent really strong period cramp. Does anyone know what this could be? After last night I laid down and have been drinking plenty of water. My nausea has also came back the past 2 days