I sat on the couch with a friend yesterday watching videos for a few hours, and when I got up to leave, my foot hurt so bad that I had to limp my way home, and I woke up today and it still hurts just trying to bend my toes back and arch it kinda. I know I have fallen arches, but I didn't step on something weird or strain it, this literally happened while sitting on a couch. How the fuck does this happen and how do I fix it
You probably sat down long enough & cut off just enough circulation to cause some muscle stress or maybe get some small venous clotting. If it persists or doesn't get any better in the next few days, go get checked out.