BH and vomiting?

Caitlin • Wife and a mommy to 2 sons and baby #3 on the way!
I'm 33 weeks and I'm in bed having pretty intense BH that caused me to go to the bathroom and poop, (soft stool) and it also made me nauseated so I was puked as well.. A lot. This happened yesterday too.. I'm starting to get worried that I'm having actual contractions because its in my lower back. I go to the DR in the morning. What should I do??? I almost wanna go take a warm bath but everyone is sleeping.