Being a mum!

Does anyone else find that when they hold babies they've never held before that they feel very awkward and uncomfortable? Yesterday I was cuddling and feeding my friends 4 month old little boy,he's very happy and smiley,but I just felt like everyone in the room was judging me,please tell me that when it comes to giving birth this motherly instinct will kick in?! Being a mummy is the best thing that's happened to me,and I have all these wonderful ideas how it'll be when my little man is here,I'm just worrying now!