Hi Min, I do, admittedly not so much lately but still 5 to 6 times a month.
I actually wake up vomiting.
Another thing which is scary although used to it now, I wake up unable to swallow, saliva pours out of my mouth as I cant swallow it down, this lasts for an hour or so, if I keep trying to swallow I will vomit, so I just put a towel on my pillow and let it pour.
I have always thought these were symptoms of Lyme but maybe not?
Post nasal drip into the stomach, full of bacteria, can definitely create nausea and stomach upset, and contribute to insomnia--caused by the neuro-toxic effect of the bacteria. When I started using a netti pot at night before bed, this ended my sinus problems, which stopped the nausea.
Before the ME I had lots of signs of toxicity and violent, mainly noctural, nausea was one of them. I'd often wake up vomitting. nothing as sedate as feeling a bit queasy and needing a bucket beside my bed, it would be sudden..... Now remembering that the daytime nausea wasn't nearly as violent. Often I wouldn't have just 1 episode a night but 2 or 3.