Nurses deal with irritable patients every day. It's part of the job. People with chronic health problems, are in pain, sick, or whatever it doesn't matter. You grow a thick skin and smile your way through it. Go home at night, toss back a couple of beverages of choice, take a hot shower, scream into your pillow (or cry into it). Get up the next day, put on your scrubs and do it again because of your dedication and desire to help your fellow man.
Please, if there is a next time, don't hesitate to pull the caregiver aside and tell talk to them They don't want to be part of the problem they want to be part of the solution.