The agony of the feet (shin)

I did a 2:1 run walk today for 6 miles. Every time I started running again, I had to wince because my right leg hurt so much. When I got out of the car I could hardly walk on it. I have a feeling I might have something worse than shin splints in my right leg. I see the doctor on Tuesday morning and I'll just have to stay off of it until then.