hi i have 15 month old baby boy . he was born fullterm with out any complications .he have sever gas and fussiness between 1 to 3 month and then he become ok . later on, he get sever gag problem when he started on solid food .now at 15 month his issue is bit resolve but still have occasional gag reflex. he is quit baby during his development started to say dada at 11 month and started walking at 11 month ,he sit on 8 months and crawl on 7 month, have 4 teeth at 7 month (first have upper incisors)now he have 10 teeths ,he is happy baby during all his journey . now since last 2 month i notice some changes , before he respond well, when i told him to say hi, he move his hand on head (cant say any thing but shows hi, and he do 1 more act if i told him to do so.)cant say words (he did that from 12 month age)now i saw he became less responsive on say hi ,and at 15 month he do not point things, instead , he pull my cloths and show tentums (he always come to me when he want food and diper change ,never go to his dad for these work). when i make bottle he run to bed with me, he recognize me and his dad(when his dad come home he run towards door. even when his dad dress up, he show his tentum that he want to go with dad) he is showing some abnormal things like when we call his name he dont respond but when i call him from other room ,he follow that command , some time show no response on his name .fappling hands when he show tentums. often flapp hands on table and floor .,he only say mama , papa, baby and produces noices like uhhh and ahhh(when i told him to say papa he usually return me with papa.and when i told him to clap, he usually clap). he do alot of toe walking in bare foot (do not do toe walking in shoes).i am living alone he dont have much exposure ,he watch cartoons alot watch them very consistently,playing with toys but dont have any favourit toy. when i show him how to point thing he try to make his finger point but not in direction where i want to point , when ask him give my the toy he have in his hand he put this toy in my hand but not ready to leave it so after while he get it back .when we r out he go to peoples produces uhh sound and smile mantain eye contect with them but cant play with other kid , (go close to kids again and again dont stop over there and paly.play alot with grass and leaves).he also understand if i say( no) to him some time show no repose on (no)after all long story my big concern r 1- he is not pointing things (although show tentum to me that he need some thing but unspecificlly).2- he flap hands during tentums (some time in air and some time on floor ), 3 - keep walking in social places see other people and observe them but dont go close to them (busy in his activities all times ) 4-toe walking . 5-cant call mama or baba when he is alone in his room (he can say mama, papa ,baby (but can,t know who is mama and papa ) 6-cant point pictures from book (more intrested in touching by foot some time turn page ,he have more concentration on cicles and geometrical pictures but still do not point them )6- he play isolatly with his toys shoes and other stuff and he spread every thing but some time put toys back in drawers . i just want to know is these signs r autism signs