Plantar Fasciitis?

Hi everyone. I need a little advice. Sorry for the long winded post but here we go.

I'm in my late 30's and began training for an Oly tri. I had been more or less sedentary for some time (a decade or so). I am also obese, roughly 225 and 5'10". After seeing the doctor for an OK I began to train slowly. Here we are 3 months later. I have lost a few pounds but I'm still heavy for my height. My swimming is fine. I can bike without issue but running was taking longer. I finally got to the point where I can run for 3 miles without walking. I feel good, my training is 3 weeks increase in distance followed by one week going easy. I take one full day off a week and do one or two bricks. The bricks are easy workouts (1/2 my long days at a slow pace). I monitor everything with a heart rate monitor and try hard to keep things easy.

Now I suspect I am developing Plantar Fasciitis. My heal is sore right where my arch begins in the middle of the foot. It is not very intese pain but it feels stiff in the morning. It feels much better if I strech. Most of the day I don't really notice it.

I figured I would go see the Doc but as luck would have it he is less anxious to see me. I can't get an appointment for a couple of weeks.

Here is my quandry. I am 9 weeks from my race. I can swim my race distance. My long bike is almost equal to my race distance as well. My run is at half race distance but, now I'm worried about my foot. I don't want to make things worse but I do not want to lose all my base etiher.

I am considering the following precautions:

1. Stop running for two weeks, replace with walking race distance once a week and one short recovery walk. Bike a little more since that doesn't seem to be causing me any trouble.
2. I bought some gel heel pads.
3. Streaching my foot several times a day.
4. Monitor how my foot feels daily.

Am I crazy for trying to continue under these circumstances or does this seem like a reasonable approach?