Vomited from radiation while out to lunch

My partner and I went out to lunch yesterday. He's on week 4 of 6 of radiation and took chemo (3 pills one Sunday night every 6 weeks) the prior Sunday. He vomited EVERYWHERE while we were in the middle of lunch at a crowded diner and after I flagged staff to assist, got him more napkins and grabbed our stuff so they could clean and my partner could clean up I went to wash my hands and just... Wanted to cry??? Not from embarrassment, there's nothing embarrassing about this to me, but from fear, I think, that things are going to get so much worse. I don't know what to do. Things have been so hard for me, my mental health was in the toilet for a bit, and we try so hard to live normal lives - lives that don't reflect this is happening. So I guess having it shoved in my face that it is scared me.