Thanks so much guys. I'm now looking for another 5k to sign up for.
I was going to take a few days off from running after the 5k, but this morning (after a weekend of bad eating) I was up 4 pounds. I decided I should get my biscuit out on the pavement.
I did the week 4 workout and tried it with a heart rate monitor. It made a HUGE difference. I barely broke a sweat and felt like I could have kept going. Since I've had problems with pacing myself I'm going to continue running with the heart rate monitor in the future.

I count on weekends to go for good strong runs as my runs during the week tend to be not quite as good and focused. But if I take the time to heal up now, I should be okay (fingers crossed) for next Sunday's 5k. If it's not better on Monday, I have to go back to their specific sports injury doctor/physio guy 

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WOOOHOOO!!!!! I'm so happy you're better.