I have BHs often and they are painful (but not excruciating, and nothing like real contractions.)
I find that after I get adjusted by the chiropractor I am much more comfortable, have less BHs, and even have more energy. It might be something to look into for yourself.
I hope everything turns out fine. Your doc will probably want to do a NST, and he may want to monitor you for a bit to see if you are having real contractions.

I hope you get some good news tomorrow!