Many years ago I injured my knee and needed crutches to get about - I wasn't doing anything crazy, literally just stood up and my kneecap popped out of place.
It was eye-opening how many places weren't accessible, I remember one restaurant, booked by friends, steps into the building, seating up another flight of stairs, toilets were back down those stairs and up a different flight. And the amount of doors that were dropped on me, it's like you literally become invisible, never had it happen as often when I wasn't on crutches.
I was pregnant in 2012/13. I remember being on a train, obviously pregnant - and there was no mistaking it, as the bump was very prominent and the rest of me had lost a significant amount of weight due to sickness (dropped around 2 dress sizes). Had to grip on to a pole as I was feeling very unwell, clearly looked unwell, couldn't catch anyone's eye, they all avoided eye contact, and if anyone did glance in my direction they quickly looked away awkwardly. Next stop was about 5 minutes away - four or five people got off, including one of the men who had looked at me then ignored me. They wouldn't put themselves out by standing for 5 minutes.
And I did get asked why I was so miserable when I'd wanted this - I wanted a baby, not to spend every waking hour feeling extremely nauseous, for walking to make me dry heave, for water to cause instant vomiting, to be lucky if I kept down one meal a day, to be told by a GP to go away and try harder to drink. Oh and then to develop pre-eclampsia.
Point is, I suppose, there are lots of arseholes out there.