M.R.
Whoa.
She is 10 weeks old. While many of us with autistic children can look back and say that we saw signs this early, there is nothing diagnositic for a 10 week old to determine autism, and if you start asking if my baby has it, your pediatrician is going to write you off as a nut. You want them to take you seriously. First things first. Speak to your pediatrician right away and get some referals. They will probably have you get her eyes checked and her hearing checked and may have you get some early intervention to help her track objects. Watch her developmental milestones very closely.
Next, stay off the internet, but if you get on it, read about develomental milestones so that you know what she should be doing. I don't know what you read, but you are finding stuff that is so way off in the lunatic fringe than even the most popular garbage is. Anyone can draw a crazy conclusion and put it out on the internet about what causes autism. If she has it, she has it, and blaming yourself for something you don't even know yet because you read something that is nutty and unproven is a waste of your time. Find out what you can do with her right now that is NOT a waste of your time.
M.
Talk to your pediatrician, and act sooner rather than later since you have a gut feeling that something is wrong, trust it. Don't try to put a name on it. Don't try to find out why, because why does not matter and it won't change what you do about it.