When I was pregnant with my third child, I developed a condition called SPD (symphisis pubis dysfunction) that made standing or walking for too long excruciatingly painful. I was only four months pregnant and looked perfectly healthy, but I had to use the motorized carts at the grocery store to do my shopping. When I'd stop the cart and walk to a shelf to pick out an item, I often wondered if people questioned why I was using the cart. I wasn't elderly, and I wasn't injured. I barely looked pregnant and could clearly could stand and walk. Did they wonder if I was just lazy and selfishly taking the cart from someone who really needed it?

That was my first taste of what daily life can be like for the millions of people living with invisible disabilities.

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