Got anxiety attack due to stressful night at work, My job place wont pay my medical bill...?

Ive been working at this Hotel graveyard shift 6 months already. On new years eve I got called in to work early because it was really busy due to a new years event. I work as a bellmen and valet parking, well when I arrived at work I find out that there is a big line of cars all from our hotel to the street and that we were short in valet staff, it was only me and another person. well the problem came when my partner had to do a shuttle run to pick up guests for the hotel and I stood there by myself parking cars and returning them, and all the pressure fell on me and I feel that I overworked myself that day. The thing is i got so stressed out that I started to have anxiety attacks for the stress I got from all this, and ambulance picked me up at work and took me to the hospital. Now that I barely received my medical bills my boss dont want to pay my medical bills even though I was on duty and basically told me to pay them on my own..should the hotel pay my bill? is there anything I can do legally?