Hello, some things you mention i would say yes but then other things you mention and i would say no!! But thats the thing with autism, there isnt a real box of symptoms that fits all children its such a broad spectrum with varying signs and symptoms. I would suggest getting some books to read about autism to see if your son fits into any more categories. My son was always obsessed with lining things up and if you disturbed the pattern, god help you!! He would (and still does at the age of 5) line up trains and push them around the track ALL day, his focus becomes so intense in that activity that he is totally absorbed. He will lay down on the floor head on the side, cheek on the floor and watch the wheels go around, pushing the train backwards and forwards. You cannot get the trains off him and you cannot get him onto another activity without hell. I cannot play trains with him as he yells and screams that im disturbing his track set up and im not pushing the train properly!!
I would say if your sons behaviour is not severe and its not disturbing the household from running then dont worry, only when daily life becomes a battle and the family cant function without him being the centre of attention is when you need investigation. The tantrums and meltdowns and aggressive behaviour towards us and himself was too severe for me to handle. Breakfast is a nightmare if he doesnt have the same bowl and spoon with it all lined up correctly, bath is a nightmare, brushing teeth is a 1 hour screaming battle, wearing clothes and shoes is impossible, getting in the car and wearing a seatbelt is distressing, going somewhere new or having visitors is crazy chaos, etc. The whole day is extremely stressful for everyone and many meltdowns and angry behaviour comes from him. I seeked help and had to fight with every professional i came across before a final diagnoses of High Functioning Autism more Aspergers was made. Even then he doesnt fit into ALL the boxes.
Do some more reading, watch his behaviour but if its not disrupting the rest of the households day to day running then dont worry, its probably just the two's stage and he will grow out of it, just be patient and teach him right and wrong. Good luck :-)
I would say that your son's behavior sounds pretty normal for a 26 month old that doesn't have autism. I think that the lining the vehicles up is actually a pretty common thing, kids just do things like that sometimes. And toddlers get VERY angry when you disrupt what they are working so hard to do. I know what it's like to over analyze every little thing and be afraid your child might have autism or something else, but based on what you described I think your son is OK.
I feel how worry you are about your son. I think there is no need to worry about him. It happens sometimes. If you feel something wrong you take a test and consult any doctor. .