If you're in that much pain go back in. Doesn't matter about the contractions, they need to help you with the pain.
I recommend taking a shower (since bath y probably just too complicated to sit down and stand up in the tub with the belly and all). I had contractions few days ago just like that, for over 3 hours I felt a lot of pain, pressure and contractions. I woke up my husband at 5am I couldn't deal with the pain, so we were preparing to go to go to hospital, I got a shower and it was a blessing. All the pain went away!
Make water a liked warmer than usual (I know with all this heat doesn't sound too appealing), and focus on belly and back.
Hope you feel better