For those of you with nausea/vomiting, how did you make it at work?

I work with patients at an eye clinic and if I need to puke or sit down I basically can’t. If I call in I’m totally screwing over my coworker and there’s only one that does the same job as me so it will totally make her day suck if I just call in. What did you guys do? Was your work understanding? My work was pretty good through out the ivf process but some people made rude comments as I took days off for procedures and it totally pissed me off. So now I’m afraid if I take off any work cause I’m sick they’ll just judge more! Ugh