Woke up vomiting at 33 weeks?

So I had a lot of morning sickness this pregnancy but haven’t gotten sick since 14 weeks. I do get bad acid reflux at night but usually I take a couple Tums and feel fine enough to sleep. Last night was no different but I woke up at 4 am with a mouth full of burning (acidic) vomit. I think it was from acid reflux or stomach acid and I couldn’t get the taste of it out of my mouth for like an hour. I continued to feel on the verge of getting sick for a while and my throat was burning. I eventually fell asleep again but I was sitting straight up. Now my sons taking I nap and I’m obviously tired so I went to relax in bed and I immediately feel my throat burning again, I’m not even laying down! Has anyone else experienced this? Is it acid reflux? More serious? Suggestions? Thanks