your not a nutcase and it is normal
Unfortunatly for me it was stress stress stress until the first dr's appointment , then until 12 weeks , then until 20 weeks , then 37weeks and then the due date and birth hehe ( see? its me who's the nutcase )
Just remember that time flies and before you know it first trimester will be a distant memory..
sorry I dont have any more substantial advice , but hang in there !