Monitoring me and baby

Came in because I was having lots of pressure and the urge to need to pee constantly. Turned more into contractions called drs office and they said to go to ob and get monitored to be on the safe side. Came in and am having preterm contractions more pressure and dilated to a 1. They are almost positive I’m passing kidney stones so they are pumping with fluids and pain meds to try to flush me out to see if that’s the cause. They are keeping me overnight at least to monitor baby and myself and watch these contractions.