i'm a guy and probably don't belong in this conversation. but (yes, there's always a "but") maybe i can provide a bit of insight.
for one thing, i really don't see why having a baby is so"fulfilling." maybe it's a gal thing. but then, again, most women don't care for football, which is infinitely more exciting than having a baby.
seriously, what the others have said on this thread is great advice. but you can talk this subject into the ground and not be any closer to a decision. having a baby is usually (from what i understand) an emotional decision, not a reasoned and rational one. even so, you are aware, i hope, of the risks to yourself and to the fetus, can you honestly put your hand on your holy book and swear that you can go without pain meds for at least a year? and that you will be physically, mentally, and emotionally able to tend to the infant 24/7 for at least a year to a year and a half? is your loving husband going to be able to cope with you being down with pain and him having to tend to both you and the baby? having a baby is one of the great stressors on relationships and you are compounding that stress with your cp.
i know that having a baby is important for many people. i wouldn't condemn a child with my mis-begotten dna. i got a family when i married my wife and give them, their kids, and grandkids all of the love and attention that i am able to give. but passing on my own dna is not something i would dare to inflict on an innocent.
i hope that i have managed to provide some useful input to your decision-making process. i pray that the gods will help to guide you and protect you.
That light at the end of he tunnel? It's an on-coming train.