Look at your area's ADA laws and then respectfully bring this up to your supervisor. Good luck. ☺️🙏

I agree with the bathroom idea or how did you get there? If by car can you go sit in the car for a bit? I've sat on the floor before now and even found a clear shelf and half sat on/againt it. Also if this is a common thing, I'd suggest biting the bullet and making sure you always have some form of aid with you from now on. Better to have it and not need it than need it and not have it xx

If it is like you took your car into a shop... then ask whoever is there. If no help, sit anywgere you can find, call someone to pick you up.. .

Find a store clerk, ask them if they have a chair you can use, that you need to sit for a bit, but there isn't anything readily available for you to do so. If they aren't willing to help, ask for a manager. Most smaller shops don't have sitting areas but probably would willingly offer something if asked.

Find a bathroom and sit on the toilet. That's what I do. Just keep adjusting your legs cause they both can fall asleep then ur stuck there. It's happened to me. Lol it sucked bit a bathroom is the best place to sit if u need to. I can't take any pain meds not even Tylenol and when it hits me or I let the pain get to bad by pushing myself ilk just go home. Doesn't matter where I am and what um doing

I've sat on a shelf or stand before or at least lent one for support