Isn't being a grandmother the most wonderful thing? I can hear your joy, su.
But you know that she isn't your baby, however much you adore her, don't you? One of the things we have often discussed on GN is this fine line we tread, learning when to keep our mouths shut and being very sensitive to our new mums' needs and worries, and knowing when to step back.
I wonder if your relationship with your own parents is making you afraid that somehow you will end up like that with your DD? There is absolutely no reason why this should be so - you seem to be a thoughtful and caring person. Try to let the fear go.
And enjoy every minute of being a gran!