So I have a medical issue.
Me and my friends smoke a lot of pot, and sometimes my body just makes its self throw up. This happens often but it has slowly gotten better over the years.
I don't know how to stop vomiting though. I've tried forcing myself to not vomit and it helps every now and then but not really.
Also some days it's so bad that just thinking about the hit and hit my gag and Ralph everywhere
Ask a doctor.
Space out how often you smoke.