Nausea/Vomiting

So I MAY be getting over my morning sickness (really, all day). But I'm having times where I get nauseous from nowhere and vomit. I was wondering how y'all go day to day with this not knowing if it's coming or not. I'm scared to go anywhere because of how sudden it can be, and I can't even work! I'm a nurse by the way, so 12 hours of being on my feet and not always in the path of a toilet can be hard. How are y'all doing it? I guess I just don't want to embarrass myself?! Help!