I don’t know from experience preterm labor signs (my 29 weeker was a c section baby/ didn’t go into labor with him and my first was an induction so idk about natural labor)... but have you been staying hydrated? Have you tried Tylenol (assuming your doctor has told you previously it’s okay and you don’t have health conditions preventing you from taking it)? Or maybe taking a warm bath or switching positions to see if that helps? I’ve been having a lot of pain lately but I’m contributing it to round ligament pain.
When will your husband be home?

Yes true I'm just waiting for my husband to get home.

Go get checked out hun better safe then sorry I hope all is okay and your already