Agree with Sue. If no issue today and if that trend continues, no problem. Heck, I think I deal with something hurting for the first mile nearly every run I do. It's called working out the kinks.
One thing I would add, massage out the bottom of the feet. A glass bottle or jar works good for this. I used to always use Snapple bottles (back when I'd occasionally have a Snapple) and just roll them back and forth under my feet.
great advice. I dealt with PF for 2 years had massages weekly, saw podiatrists. What essentially got rid of it was exercising the bottom of my foot a few times daily. I would stand on one leg with the other extended 90 degrees behind and act like I was picking up a coin from the floor with my hand. To maintain balance, just about every muscle in my foot had to fire.