"Well, I don't know anybody else with dead parents. Not saying they don't exist but personally I don't know any. Just frightened about not being able to cope and having the baby taken off me or something."
No one will take your baby off you, really, I am sure you will do a fine job of parenting. It is very rare for parents to lose their kids and if you did have any issues, support could be put in place.
ASorry if I am on the wrong track but I think you need a bit of counselling to process the death of your parents, or to reprocess planning to have a baby in light of your parent's death.
You seem a bit preoccupied with death... "We have some friends but no one I could expect to have a baby for us if we died or something."
We had to make a will deciding what would happen to our child if we both died. We did it when she was 1, she is now 12 and we are both still here, it is quite rare to lose one parent as a child and even more so to lose both. I know because it happened to you that you are very aware of it.
We chose my sis to look after our kids but I could easily have chosen my closest friend, I got to know her after dd was born, we live close by, she is a great mum and if my sis was not around and both dh and I died, she would get our kids.
But as I say, there are no signs anyone will get our kids but us. That is the norm for most families, honestly.