Bit of backstory: I started work as a cashier at a clothing store in the US in late September. Coming up on two weeks ago, I was sexually assaulted (outside of work if that matters). I brought my manager my ER excuse and told them why I had been out and that I'm currently on a concoction of antibiotics and antivirals. Less than a week later, I had gone to urgent care and gotten a note for two days off so I could recover from the nausea and vomiting the medication and anxiety are causing. Both side effects still occur, and I was given an anti nausea medication to try to help.
Earlier today I had messaged one of my managers after vomiting twice while trying to get ready for my shift, and I was guilted into coming in for a later shift (one hour later). I am almost always the only opening cashier. I wasn't sure if I'd be able to come in at all, because when I did I felt like garbage (and I still do, I have two and a half hours left today). My managers say they're sympathetic to what's happened, but their actions & scheduling say otherwise. I don't get paid enough to deal with asshole customers while feeling like I've been hit by a bus.
I'd quit on the spot if I could, but I don't have any savings and I don't have a different job lined up. We don't have HR in the building and I don't know how to contact them. What am I supposed to do? I'm actively looking for a new job and hopefully I find something soon but for now, how am I supposed to deal with management?