Dealing with Chronic Nausea and Vomiting

over the last two years I've been dealing with bouts of nausea and vomiting that can be anywhere from a few weeks to a few months between. they seem to come out of nowhere and don't seem to be related to any food in particular. I've missed work and school because of it, and it's really starting to take a toll on me. I at first thought it was food poisoning or a stomach bug the first couple times, but it just seems to hit randomly and without warning. I've tried nausea home remedies (mint, gum, ginger, Tums, smelling alcohol swabs) and nothing seems to help once it comes on except waiting it out. anyone experienced anything similar or have any advice that's worked? anything is greatly appreciated ❤️