For the past 2 months, the arch on the bottom of my left foo

For the past 2 months, the arch on the bottom of my left foot feels as though it has a sock a bunched up underneath of it, but there is no sock there. The sensation is hard to explain. I'm wondering if the muscle connecting the heel to the ball of my foot is having dystonia or fallen arches or something else? It's going to take a couple of months before I can see a doctor for this condition. It's painless, but it just feels so strang