When to take it seriously... BH or Pre-term?

I’m 36+2. I had my first daughter at 35+5 almost 13 years ago.

I’ve had BH since around 26 weeks with this pregnancy. I was tested for pre term labor at 26 weeks, and the test was negative.

Tonight, I’ve had contractions (tightening) with extreme pressure, period-like cramping and lower back/hip pain for almost 2 hours. Contractions are about 10-11 mins apart lasting a min to 1 1/2 mins. I feel like I’m hydrated and I’ve been laying on my left side for almost 2 hours while timing, other than getting up to use the restroom.

I hate to go to the ER with this on Xmas eve.