Hang in there!! It's completely normal to be having worries about Nick! I'm the same way....I think it's just human nature.
You'll be holding him before you know it!
I can relate with the other added stress too. I'm having such a hard time trying to keep my house in order and DH is no help what so ever .... URGHH!!! A pregnant woman can only do so much!
Try to take it easy over the coming weeks....everything will fall into place