Iliotibial Band injury??

Calliope610

Although I have been walking for several months, I recently started training for a 10K by increasing the length of my walks to 4-6 miles while following a C25K training program. This increased intensity of walking/running has caused slight pain to my right knee, specifically the inside of my knee, just to the side of my knee cap. This is actually "discomfort" as opposed to "pain", but I don't want to cause any further damage by continuing intensify my training. I know that's not much information to make a "diagnosis", but I hope that others with more knowledge will know what questions to ask me so I can get some suggestions as to a course of action.

For what it is worth, I am an under-pronator with a high arch.

Any suggestions, comments, etc are greatly appreciated.