T.O.
M.,
Please try not to take this the wrong way.... but your child might be autistic now and you wouldn't even know it till later. It is hard to diagnose at that age in most cases. There's a huge range, from extremely mild that you hardly notice to very severe.
I'm just saying this because what if you get the shots and 4 years from now, he's diagnosed as autistic? Would you blame the shots? Would you blame yourself?
I have a son with Asperger's Autism. And I can tell you that I went through so many scenarios in my head, and at times I felt I must've done something wrong.... I'd ask myself "did I take an Advil before I knew I was pregnant?", "Did the c-section do something?", "Was it the shots?".
All these things I asked myself and beat myself up over and I came to a conclusion. No one knows what causes autism. Yet.
So in the meantime, you have to do what's best for your child with the information you have. They may find out a decade from now that because we had allergy shots before our babies were born it caused autism. Or maybe because we the anti-bacterial soap we all use triggers autism in some. Or maybe it's a genetic mutation that just reared it's ugly head now. NO ONE KNOWS!
This is the scariest thing about having children, that our decisions can make a huge difference in our babies lives and sometimes we feel guilty about those decisions. I always tell my husband that if teenagers could feel the guilt (and fear, anxiety, etc) that parents have over their newborns, then there would be NO teen pregnancies. Heck, I bet they'd stop having sex if they new the terror of a new mom realizing the whole world of another person was in her hands!
So the answer is, you have to do what you can live with. Personally, I do not think the shots cause autism. And there's a good chance your child could get measles, mumps or ruebella. And they're bad stuff.
However, wait to see what the other mom's say. There are some that feel very strong about the autism/vaccine issue. And there are suggestions out there about how to meet this issue half-way too. Hopefully, some of them will send you the sites.
You wouldn't be normal if you weren't worried about your baby. It just proves your a good mom.