Preterm labor? 23 weeks

Thai is my second pregnancy and yesterday morning I was as having pretty intense back pain with what felt like menstrual cramps in my lower abdomen/pelvic area. I was up on my feet a lot cooking and preparing for guests on Christmas Day, and the pain eased when I rested. I don’t notice it the rest of the day. Then last night around 3 am I became very nauseous with intense back pain again. I took a bath and laid down and drank water and finally fell back asleep. It’s back again this morning (the back pain and crampy feeling). I don’t necessarily fee any contractions but I also never felt them with my first idk what to expect.

Would you just rest and take it easy today? We have been quite active lately with all the holiday festivities and not sleeping well because my son has been sick. Baby is moving a ton and I haven’t had any change in discharge or leaking.

Anyone experienced preterm labor this early? What were your symptoms or what did you do?

Thanks for the help!