Lightening crotch?

Ok. I’m 31 weeks and have already had preterm labor contractions with no dilation. I’m still a week out from my next dr appointment. I DO NOT want to go back to the ER! I came out of work today so I’m putting myself on bed rest. I also was put on Procardia to stop contractions. Today however, I’ve been having lightening crotch. The kind that stop you in your tracks! They went away but still scare me! I still have a few contractions here and there but nothing like I was having. Anyone else experience any of this?? I’m trying to avoid going into labor this early at all cost!