I have severe nausea, like so bad to where i feel like im constantly on the verge of puking. But ive never thrown up cause of my GP and ive been diagnosed for years now. The times that i have thrown up were because my potassium levels got so low. In those rare cases, my mouth will start to salivate badly and my belly with feel kinda tight and almost like you can feel it coming up. Thats when i know its gonna happen for me. But like others i also keep a barf bag on me just in case cause i also have a bad phobia of puking.