Whatever struggles you've had in the past, Hormone, you sound like a really thoughtful and loving parent so I'm sure you will be picking up on any potential problems and handling them well.
Yesterday I did a search on my past threads - first thing I've done this - and saw a thread I started a couple of years ago about dd1, about how aggressive and anti-social she was, that people were suggesting she was autistic, and I was just in pieces thinking she would never be 'normal'. Lots of kind posters made suggestions, some of them agreeing that she did sound as though AS may be an issue.
You know, within a year those problems had all but resolved. dd1 is still a bit sensitive and complicated, but has made a great start at school and gets on well with the other children (quote from her teacher: "I can't lie to you, she is a drama queen. But to put it in perspective, so are 50% of the girls in her class.") At the time I posted, I wasn't being OTT: dd1 was very strange, her pre-school teachers were concerned about how she would adapt to school, my mother was suggesting getting her statemented... I was right to be concerned, because I didn't know which way things would go.
In the same way, you are absolutely right to be concerned at any possible signs of problems, and to educate yourself about how to respond to them. In a couple of years, this may turn out to have been a complete blip, or may be early warning of a long-term issue. That's the way it often is in parenting, isn't it?