JMC - PF & I go back quite a way. In fact so long that I cannot remember the last time I ran without pain in my foot. Sometimes it's mild discomfort, other times it's downright nasty to the extent that it alters my running stride and leads to other overuse/compensatory niggles.
As NI mentioned, the choice of shoe can either aggravate or alleviate depending on your gait, weight and avg mileage. Hope yours clears up quickly if your self-diagnosis indeed proves tru but don't buy into all the complimentary therapy b*ll*cks like night splints, orthoses, frozen golf balls, etc, etc. Tried 'em all with zero success.
It will go when it goes..