Band Slip or Pinched Nerve?

I can't get ahold of my doctor's office, but I've been on a new medication lately that has made me sleep a lot the last week. So my pinched nerve in my back flared up and when that happens the pain usually wraps around my stomach. But I haven't had it happen since I got the band- not this bad anyway. So the last day I've been feeling this major pain in my chest/stomach areas and I vomited once this morning because I ate too fast trying to get out the door and it hurt really really bad. I don't know if it's from the pinched nerve or a slip.

I know no one can tell me obviously what it is. But can anyone tell me please what a slipped band feels like?

Thanks