Dear Chad'sWife..
When I was pregnant with my daughter, there were no Home Pregnancy Tests. I went to the doctor late for two reasons.
1) My blood tests always came out negative - even at five months, and already showing.
2) I didn't go until it was too late for them to perform a therapeutic abortion because I was told that I shouldn't get pregnant due to a heart problem.
So, you see, we each differ, no matter what the text-books say, or what doctors think is 'normal'.
What I did as soon as I suspected I was pregnant, was take my vitamins and iron, stop smoking and did not drink alcohol, and just generally keep up a good healthy diet. We also did not have information from the internet at the time, so you are at an advantage here.
You can also hook your husband up to a good internet site so that he can read for himself to feed his curiosity. That way he will not get on your nerves so much. Because we all know that stress needs to be avoided if you are pregnant.
Good luck, dear, hope your wish comes true, and please keep us posted.