Havetobecrazytolivehere, I am so sorry for your loss and congratulations on your pregnancy.
I agree with PennyHasNoSurname and anotherEmma.
You are not 'wrong' but I can't see it is helpful to your marriage.
Firstly you husband should not be telling you when you can test! It's your call. What he can say is please do not tell me until you get to XX weeks. Which seems fair but also rather selfish, and a bit childish, what you have called 'head in the sand'!
I sincerely hope all will be well with this pregnancy but if, in future, you were to have another loss you would need to tell your dh and have his support, which may mean you end up (ONE DAY, not now) not telling him until after a loss! I sincerely hope you do not have another loss and you need to know that you and your dh will cope when you know how things go, no one with their head in the sand
To be fair to you it is rather childish of him to struggle with the 9 month wait! He should be saying how can I help you with this, not trying to avoid it all.
I hope this pregnancy goes well, tell him when you are ready but before the next explain it takes 9 months and many women find out at about 6 or 7 weeks so it is about 8 months wait during which time you need to rest, and he needs to help you, if you can;t tell him when you are pregnant he then need to help you ALL THE TIME in case!
Best of luck.