Is my son possibly autistic?

He is almost 10 months old and doesn't babble. he does vowels, but no consonant sounds. At all. He did some Rrrss awhile ago but not anymore. besides not babbling he is developing normally. He crawls, cruises, sits, stands up on items, walks while isted, etc. He seems to respond fine to his name and to tone inflections/no. he is vocal with grunts and vowels (like eeehhh, uhhhh). He smiles and laughs all the time, in response to stuff done around him. He does imitate gestures, like waving (sometimes) and clapping). If I talk he will "talk" back with grunts etc. He can eat by himself, hold a bottle, has pincher grasp, sits through books, follows mama/dada from room to room or cries if we leave the room and starting to show stranger anxiety. He likes peek-a-boo and singing songs like wheels on the bus or if you are happy and you know it. If you point at something, he'll look and he has great eye contact. but he doesn't really follow verbal commands nor does he babble. His cousins (3 boys, 1 girl) all were delayed talkers and I don't know if this is just inherent in our family. However, I've researched online and it can be a trait for autism which scares me to death. The dr. at his 9-months said he doesn't see any developmental delays and to see how he does at 12 months. however, I've seen no improvement in his speech in the past few months. I know babies develop differently, but what do you think? Also, depression runs in my family. I know there are no "concrete" links b/t autism and anti-depressants, just an awareness. Yes, I did and still do take anti-depressants. I did when I was pregnant with him and fed (still do 3x a day) feed him. The benefits outweigh the risks in my case and I researched/discussed with drs. for 2 years before I conceived regarding this very issue. I tried to not be on them, but it wasn't smart.