I go back to work tonite

And, I'm very apprehensive about what will happen. Will I get wrote up having to leave work in a middle of a shift? It's just another nail in my coffin, because this happened on a shift where I was working with two supervisors who dislike me intensely. I know what they will say, I shouldn't have come to work in the first place. But, it was a completely atypical attack. For one, an attack lasts between 4 to 6 hours. This one lasted around 10. Secondly, I have only vomited on two previous attacks, and that was at the very end of the attack, ending them. Three, the pain is worse at 1/3 mark, depending on what kind I'm having-----the vomiting ones only last one hour and the pain comes in waves, get worse just at the end. I had been having that attack for 4 hours at that point. How was I to know it was going to get so much worse? Until then, when i threw up, it had been uncomfortable, not unworkable. So I'm worried.