It doesn't SOUND like it, but it could be hard to tell!
AS is often misdiagnosed as ADD/ADHD apparently!
The literature is BIASED! Unless you look at given examples, etc... it may lead to the wrong conclusion. The stimming, for example. when I first saw that, I figured WHO DOES THAT? I saw the examples, and said I do that, EVERYONE seemed to do it earlier. Then I noticed the definition DID say "This is also present in many normal children". WOW! So the key is that autistics may do it more, and never stop.
I can predict what people will do also. I think that is another bias. I DO sometimes find that I didn't pick up on something everyone else did, and my predictions ed up WRONG.
I used to always be EARLY to things. I did notice the lateness as a POSSIBLE symptom. Frankly, as a kid I was VERY orderly, and tried to be early. That might have been because of an early idea that if I got too involved, I WOULD be late.
I often don't get angry over changes in plans, but HAVE been known to.
The lack of an obsession/hobby is one thing that makes me doubt you have AS.
Do you have any odd sensory skewing, and were you hyperlexic before 3?
Steve