It stinks, but you'll find many other ladies here likely are in the same position.
You're DH is right and unless you've been through the pain you never really know what it is like. Think back to when you may have heard someone had a miscarriage (prior to having one yourself), did you keep asking how they were doing a month, 6 weeks, 6 months later or remember their EDD? I know I didn't.
My best friend had a loss 3 years ago and I remember not really getting why she was still sad after so much time had passed. I didn't judge her, I just didn't get it.
I've never come out and directly said anything to someone unless they said something that was truly offensive or really upset me. I do, however, answer truthfully when people ask how I'm doing.
I think because miscarriage is still sort of a taboo subject that doesn't get talked about a lot, people sort of expect you to hold in your feelings and move along.