Any one have issues with PTL?

LadyPuma25
I'm 33w 6d. I've been having issues with major pressure, back pain and now diahreea for the past week. I had an ultrasound on Monday (I get an US and an NST once a week because I'm high risk) and the tech said she was extremely low. Last night had major BH and pressure and still do.. I called the nurse who just told me to eat rice and drink water. Idk what to think right now, something doesn't feel right.