Emkana - You have such a lot to get through - you don't know what you are facing, whether the consultant is being cautious, etc, and it is a HUGE strain. I do think it would be worth a visit to your gp, and tell her how much stress and anxiety this is giving you, and asking for counselling. I spent a long period of my pregnancy not knowing what the eventual outcome would be, and the first few months learning to 'feel normal' about all the things we were finding out about DS's leg. For example, we had to decide whether to have his leg amptated or go for extensive and dificult surgery.
This took a HUGE toll, and undoubtedly contributed to my havng low level depression. If I knew then what I know now, (in terms of my mental and emotional state) I would have sought counselling to help me think through my thoughts and feelings and to help me save some energy.
Awful feelings, like not daring to see DS's leg as a problem, because that felt disloyal to him.
I imagine that achondroplasia brings with it very confronting feelings for you and your child. I have no doubt that the outcome is happy - as in the case of CD's friends, but that doesn't mean that the journey is at all easy for you, or that you should expect to undertake it alone or without support.
GPs routinely refer people for counselling, I think you can have 6 sessions on the NHS.
Your baby may well be perfectly typical, your baby may have achondroplasia, but either way the stress on you atm is enormous.
All I know is that consultants DO spell out the worst case scenario, because (sadly) they are afraid of being sued if they don't. This was told to me by a MNer who works in one of our most feted teaching hospitals. But i know that that is no comfort to you atm, and that in any case, you need to be prepared for a baby who has a difference.
But whether you get counselling or not, no-one is going to begrudge you as many threads as you need on MN, for as long as you need them.