I, too, got nervous about supply. I would pump every 3 hours just to be safe. You might not need to, but I would because it would make me feel better. Also, I introduced the bottle to both my kids before they were a week old. They both did great, and my husband liked being able to feed them. He usually fed them when he got home from work. It was his time with his newborn.
I think the thing you really need to be aware of is how many wet diapers she has. If memory serves (and it might not, as my youngest is 2), a newborn is supposed to have 10 to 12 wet diapers in a 24 hours period. That would be the number I'd want to be aware of, because dehydration in anyone is very dangerous.
Good luck! Congratulations on your newborn :-)