Did some walking and a week later I cannot stand on my right foot for more than 5 min.?

it literally feels like the bone is trying to push through the right side of my foot, and its my right foot that's in so much pain. i did walking and a very small amount of running. sometimes i can feel something grinding, ewww. Anyone have any suggestions. I went to a clinic and they said it was just inflammed, they may be morons.idk.