You may not know what it's called, but I'm not sure it's possible to have autism and not know that there's something wrong with you. You can just look around you and see that virtually none of the other people that you know are dealing with the same problems that you have, when it comes to functioning socially or dealing with sensory problems.
Not to mention the fact that when you can't function up to everyone else's expectations and standards, they will tell you loudly and often that there's something wrong with you, though they may call you "lazy," or "slacker," or "stubborn," or claim you're always making excuses or not trying hard enough.
I knew from the age of 7 or 8, when my parents forced me to play Little League Baseball even though I couldn't catch or hit a ball no matter how much I was made to practice, that I was not like the "normal" boys my family wanted me to be.
The first time I saw kids on television with Classic Kanner's Autism, I knew immediately that I had some form of whatever they were suffering from, but it was another 25 years before I discovered what Asperger Syndrome was, and realized that was it.
Over the years, people at work would jokingly ask me if I was autistic, because of my constant stimming and though they never realized how right they were, I assumed that they weren't far from the mark.
Whatever you may choose to call it, I don't believe you can have a disability like autism and not at least be aware that something about you isn't quite the way it's supposed to be.