oh dear

you're doing nothing wrong. The miscarriage is not your fault!! How long were you trying? Are you now 1 year and 6 months into it for the first one?
I've had 2 miscarriages myself, so unfortunately I know how you feel

It brings so much grief, and I had the feeling that I/my body failed. All the dreams... everything wiped away in one go, so hard and so difficult.
* well, it's better this way, since the embryo wasn't healthy anyway.
* you can get pregnant, so next time it'll surely go well.
* you shouldn't dwell on it too much.
* children aren't the meaning of life either, aren't you two happy together?
* maybe play more with little kids, that might activate it.
* maybe you should eat/drink this or that or blablabla etc etc...
I heard all the (exhausting) "well-meaning" comfort, advice, tips and tricks, and the only thing it did was make me think, so it's my fault. If I had done this or that then... it just didn't bring any comfort. A friend of mine said nothing, she put her arm around me and said "how hard this is, K.T." and that was all-encompassing for me, and only that helped. Then I felt that my grief was allowed to be there and I could give in to it.
Please try to let go of what others claim or think they know. The whole process of getting pregnant/staying pregnant is hard enough already when you have as much patience as you do

Be kind to yourself and your body and trust it. My patience was eventually rewarded after a few years with the sweetest little girl in the world

I really hope you get to experience that happiness too!! Nothing more beautiful than that
I hung 2 silver hearts on a nice little tree in the backyard. That way I can often look at them. One heart for each child because I will never want to forget them. They belong to me and that will always remain so.