Look at it in a different way... Can you imagine what it would be like if we couldn't even transition? If we didn't even know what trans were?

Thankfully today we're able to transition and get the SRS... We're not 400% there yet because this issue of carrying babies is a lot more complicated and there would be many moral issues in medicine and society before we can get there, but we are able to have so many other great things that in the past we'd not be able to have...
We are able to adjust our bodies quite a lot to be who we were meant to be. We're able to change our documents and to live as a complete woman just like another cis girl. Sadly, as others have said, even some cis women can't have their own kids, so that does not invalidate you as a woman. And just because you can't have kids that doesn't make you trans to people as much as it makes you simply infertile, so you can still be stealth.

I truly think you should open up to him though, it'd save you a lot of heartache and fears that will come with marrying someone who has no clue...
Wish you the best, and don't focus on the bad things. Things aren't perfect but they're pretty good