In my child's case, it was a matter of "beware of what you ask for, as you may get it". I was so scared for my little guy and i screamed and hollered and got a diagnosis in four months. No waiting. And yep, it was scary as all get out. In fact it was probably the very worst day of my life. But that was 7 months ago and had i not done it, I dont know where we would be now, but i am sure, much more frustrated. As it stands, now 7 months later, my son is in a full time ABA program is being fully investigated "biomedically" and has all his NHS therapies in place.
After just coming from a meeting yesterday where parents lamented the fact that they are still waiting for a diagnosis or considering getting one, after years and years of waiting, I am extremely happy with our decision to push the boat out and fight early on. Dosent make it any easier to know that our child is ASD, but at least the worrying about "whats wrong" is finally over.
Its an awful awful situation to have to "fight" scream and beg for a lifelong diagnosis for your child. Even worse, is when you find that there is very little help out there, or at least not without fighting for it.
But the dx is the first and very important step. It really is a process, both you and your child have to go through.
But sure, you know all this already. Fear factor is, I think, for everyone involved, 10/10