What’s wrong with my toes!?!

Okay so on July 15th of 2021 i went to Universal Studios. We walked for almost 9 hours straight. I was wearing air forces with the plastic inserts to help your shoes not crease. To my surprise when i got home and looked at my feet after the day I saw two large purple stops on both of my big toes. What are these!?!? I’ve had gel nail polish and normal nail polish on top of them until recently and i’ve noticed they haven’t changed at all. What are these??? and how do i make them go away??? please help me. (also the green is leftover nail polish)