Hi Michelle~
My son was also 2 1/2 when he fell down, smashed his face on the floor, and chipped his tooth. He is going to be 5 in April. I just left his tooth be. It didn't seem to bother him at all, and it still doesn't. The ped. dentist also recommended I just let it be. Mainly because he said that at that age, removing the tooth could cause the new one to never grow in because it is so early to lose a tooth.
My suggestion would be to just leave it be. If he seems to be in pain, or if it seems to be bothering him then go ahead and call. From personal experience though, I strongly recommend a pediatric dentist as opposed to a general family dentist.
But, like I said, I'd just leave it be unless you get a sense of discomfort from you son.
~J.~