Mummo you say that you don't consider yourself to be disabled but that it's an appearance issue and you are going to terminate because you don't want your child to be bullied?
Tbh I think that you will only accept your child's disability when you have learned to accept your own, and from what you've written here it sounds as if you have not accepted your own disability so can therefore not see beyond that to accept that your child has the same condition.
I think that you would benefit from some counselling, not to help you have a termination, but to help you to look more positively at yourself and your life, which in turn I think would help you look more positively at this pregnancy and at the future child you are carrying.
If you have had it hard with your own condition then it goes without saying that you are going to find it hard to see a child of yours going through the same.
But you have positive things in your life which far outweigh the negatives that you can see for your child.
I'm assuming that you are married? so it goes without saying that you are leading a normal life, with a man who lovesyou and accepts you for the person that you are, and you already have a daughter together, so you are living a normal life, with a "normal" family - you are already a mother and until you were hit by this diagnosis you were planning on extending your family.
I am not taking away from what you have been through as a child, but if you look at your life now can you honestly say that you would rather not have been born? Even though it's taken surgeries and overcoming adversity to get here?
Yes your child may have to undergo surgery throughout his life, but if you try to see past that then in 20/30 years time he may be where you are now, with a wife and family of his own - do you really think that termination is preferable to that?
Only you can make the ultimate decision. But please, before you even consider termination, please get some counselling to help you deal with your own issues. Surely you wouldn't rather be dead than where you are now? and if the answer t that is yes, then you need a lot more support than just to help you terminate a pregnancy.
good luck x