Hi collo,
I think what you are feeling is very normal!!! I know what its like to have "Trying to have a baby" take over your life, and like anything you desperatley want, its a strange feeling when you finaly get it!! Like its all too good to be true!!
I am sure you will feel much more confident once you hear that little pitter patter!! And then you can start preparing for your future!!
It will all seem overwhelming until you have bubba in your arms, but hang in there, it will be well worth it!!!

Take care and good luck with your scan!! I will keep an eye out for an update!!

SB
xoxoxo