What does morning sickness feel like to you?

I'm somewhere close to 5 weeks I believe. I've had bad nausea at times and cramping, but so far no vomiting. Recently I've had a few waves of nausea where it seemed worse than other times, but I don't know if I was about to vomit or not. So what does it feel like before you throw up from morning sickness? Is it just like before you throw up if you have a stomach bug or the flu? I work outside (already approved by my OB) and there's not really a garbage or bathroom super close by usually so if I can get to one ahead of time I'd prefer to, otherwise a creek is pretty much my only option aside from the grass. In front of my coworkers. And 50+ kids. Ew.🤢