Pain in the arch of my foot, going up into the side of my calf?

Also dealing with shin splints in the same leg. The entire bottom portion of my foot hurts, actually.
I was walking around for about an hour and a half yesterday in shoes that gave me wicked blisters on the heels of both feet. Once I got home, this pain started whenever I flexed my calf muscles and when I try to walk. I had the same problem with my other foot about 6 months ago, and it lasted for about a month, then randomly and suddenly went away.
Anyone know what the problem could be?
Pain in the arch of my foot, going up into the side of my calf?
Post Opinion