vomiting at 37 weeks??

Ally
I am 37+2 and for the past 3 days I have had random vomiting and I'm not sure if it's something I should be concerned about? I didn't have too much morning sickness early on, only from about 7-10 weeks and that was it. This also doesn't feel like morning sickness. It's just very random, pretty violent vomiting everything in my stomach until I'm just dry heaving. I feel fine except for about 15 min before it happens and about an hour afterwards where I feel hot, shaky, and just generally nauseous. Has anyone experienced this or know if it's something to be concerned about? My doctors office is closed until Monday for the holiday so I haven't called to ask, I would have to call the hospital and I don't want to make a big deal if it's nothing... any advice??