What's wrong with my foot?!

As anyone who knows me knows, I hate running. I really, really do. However, I don't know any fat runners, so I try to run at least once a week. Because my heart rate goes crazy when I run at a constant speed, the last couple weeks, I've been doing intervals. I've heard they help your heart rate slow down during exercise more than steady speed.

Last Wednesday, I ran on the treadmill. I ran for 1 minute at 7 mph, and then walked for 4 minutes at 3.5 mph. Repeated for 45 minutes or so, and then walked at 3.5 mph for 20 additional minutes.

When I got home, I noticed my right foot hurt a little bit. I shrugged it off. The next morning, it hurt to walk a little. I had noticed my feet hurting a bit more lately, so I figured it was time to get new exercise shoes. Ignored the foot pain.

Well, as the days have gone on, it's getting harder to ignore. There's a bruised spot on my foot, and if my eyes don't deceive me, there's a lump. I donated my old gym shoes yesterday, and bought a new pair today, but I skipped the gym today because of my foot (and because I donated my shoes yesterday figuring I'd find THE paid yesterday, which I didn't. Oopsie).

So, here's a side view of my foot. (yes, i do need a pedicure)

A view of both feet looking down. Do you see a lump?


I have not gone to the doctor. I'm afraid of one of two outcomes.

Outcome 1- The doctor says I hit it on something that I don't remember, and it's a simple bruise that will heal in a few days. Then I feel like an idiot.

Outcome 2- The doctor says I have a stress fracture of my navicular bone. Then I have to have a cast, crutches, etc. How does one drive with a cast on the right foot?