I keep feeling really down about myself and always wondering if i am going to be a good mummy 2 my daughter?

i am 39 weeks + 5 days and have been feeling like this last couple of weeks and i dont no if i could be getting post natal depression or just my hormones but if you have any advice please help?? i am over the moon im pregnant and cant wait 2 meet my daughter but the same question keeps going around in my head.... sorry probly sounds pathetic but first baby and all over the place at the moe lol thanks :)