Should I get my son checked for Autism?

Dear parents, I'd appreciate help from those who've been there.He's 16 months old and I started worrying since he missed the milestones for pointing, waving; he doesn't even kiss. He's still not saying a single word (although he does babble with variations in tonality, like if he's speaking in a foreign language). If he needs things, he would grab my hand, and take me to whatever he needs (kitchen if he's hungry, living room for TV, and his room for play). But he would never point at what he needs.I know he understands what I'm saying, and I know it's not a hearing issue, since when I'm singing to him, I have his full attention.He's not very social around other kids, he doesn't seem to be interested in interacting with them, although he's been attending daycare since he was 3 months old. Strangely he's not afraid or shy of adults, and would smile to strangers, and sometimes interact and play with them. My pediatrician used this argument to dismiss all my fears, saying if he's interacting with adults, then maybe he's just not ready to play with other kids yet.If I call his name, he wouldn't instantly turn his head and look at me. He would selectively do so, depending on whether he's preoccupied with something else. I would repeat his name constantly and he would also choose not to look back at me.Otherwise he's not showing typical signs of Autism, like flapping hands, or spinning, or banging head, or walking on toes. He doesn't seem to have an "organized" way of playing with toys. He's not withdrawn and doesn't show other red flags of autism.My pediatrician thinks I'm spending too much time browsing the internet, and I should give my son a break. Parents, I need your help, am I being a helicopter mom, or are my fears valid. If so, who should be able to take a look into this? A pediatric neurologist? or a pediatric psychologist? Obviously my pediatrician is not a good candidate. Should I test him now? Or should I wait till his a bit older?Thanks a lot for your help, and sorry for the long post. via /r/Parenting http://ift.tt/2pfkjiC