I want kids but I can't even hold a baby!

I try to stay away from babies! I get very very nervous and sometimes begin to shake... I love 3 and up!!! I work with kids Elementry mainly all the way to HS and I am great with them and people in general.  But I'm terrified of being a mother to a baby. The things that could go wrong, accidents, what if the baby chokes... or I don't wake up for the baby at night. Ect.