First time mum worries

I'm 36 weeks gone with my first baby and even though I know how to look after a baby ect (experience from Nieces and nephews ect) I'm really worried that I won't be able to look after my own baby and won't be a good mum and that I won't bond with her. I'm trying not to worry and get upset about it but the further along I get, the worse I'm feeling and I just worry I'm not going to be good enough. Is this normal to feel like this?