Hi A.,
I think you are right in getting him checked at the doctor. It might be nothing, my son is 28 months old, and he is not talking much either. He also lost some words, but not as many as your son did. I did get my son evaluated a couple months ago and he had a mild speech delay, but was ahead in his understanding level, so they were not worried about him at this point, though they will re-evaluate when he turns 3. How well does he understand what you say to him? That is one thing they will test if you get him evaluated. I was able to get a free speech evaluation through early intervention, so you might ask your doctor about that when you take him in. We got the evaluation and a consultation with the speech therapist. If they are a certain percentage behind they will also receive free speech therapy. So it is a great program. I have always read and heard that the earlier you catch potential problems, the easier they are to correct, so I would encourage you to get him evaluated just to make sure. Again, it may be nothing, but it doesn't hurt to check into it.