Thank you so much for the replies!
I know, I know you're right about Google. There's not much I can do but wait for the evaluation at this point. I just allowed myself a day to freak out, before we go away for Christmas.

You are right about information that both confirms and denies my concern, as evidenced by the checklists.
To clarify, the dr's biggest concerns were: no real words, and him not pointing and not following when we point. Something about inability to relate to others' experiences and vice versa - not including others to share his own experience. CP was never mentioned as a possibility. The dr. actually did not mention any possible diagnosis, other than to say his gut feeling is that DS is not on the spectrum, because of his social skills. DS is probably the most social toddler I know. The kid will stare at strangers in the store until they make eye contact, and then his face opens in the biggest smile and giggles. That makes strangers come to him to say hi, and he seems to enjoy the attention and interaction.
We'll see how the evaluation and the next few weeks go. We'll be around family, so maybe that will stimulate him more for talking, interaction, etc. Thanks again!