Oo, possible talaga, kaya okay na mag-start ng OT kahit walang formal diagnosis pa, maraming kids na nag-benefit even without a clear label, at least may professional guidance na para sa development nila. One of my mum friends did the same thing with her toddler kasi delayed speech din, at sabi ng OT therapist namin, mas better magstart early kaysa maghintay, kaya go lang with the therapy! The name-calling thing at delayed speech could use proper assessment though, so maybe push your pedia for a referral to a developmental pediatrician or speech therapist din, para may clearer picture, sometimes the pedia na nag-doubt ay okay lang, kailangan mo ng specialist. Preschool for socialization is great too, pero the conversation skills... that's something the speech therapist talaga ang best makakatulong. Hang in there, first-time mom struggles talaga, pero you're doing the right thing by not waiting around.