If you were referred to an OT, I assume that the doctor must be concerned as well. My first instinct was that he must just want more time to inspect the food. But, if the concern is that he may need some extra help developementally, I would urge you to pursue that with alot of a great deal of seriousness, because you really don't know how deep the issue runs until you look into it.
This is not meant to frighten you. It's just that at your son's age, it's the time to act. With early intervention, the vast majority of developemental delays can be overcome before you son reaches school age. Sometimes, problems can be hidden from us people that are not trained to notice them.
As for being able to afford it, I suggest contacting Early On. http://www.cenmi.org/pair/coordinators.asp Any child that displays a delay in developement, under the age of three, qualifies for their programs. If I'm not mistaken, they have therapists that can work with your son at little or no cost to you.
In the long run, I'm sure this will be just an interesting quirk, with no long term isues to be addressed. But, it's sometimes better to be safe than sorry.