Yes, my son is almost 4 and I have just found out that he is autistic. While I am just starting to go through the aceptance of autism, I also have lived life as though in a bubble for the also 4 years. Mason can't be taken out into public for very long and certainly not if I can't put him in stroller or a cart, something that I can fasten him down.
I don't mind that I am doing this as a single mom, it's not the parties and people I miss. What kills me at night is all of the wonderful things I hoped to do with/for my son that I can't, the things that he may never be able to do, I can't even deal with it, I just try really hard to look at his face and kiss his cheeks and know that I love him, and somehow, it has to be all right.
School is a great place to start, also check with human services in your area, they aren't usually much help, but the school system has been what has saved me from emotional breakdown.