Hey, I lost twin girls too, just over a month ago - what is it with twins- seriously, nature is cruel to them.
I also lost my uterus in the process, so I won't be having anymore of my own. It would have been the last baby for us anyway (we were not expecting twins though) I have a boy and a girl of my own, and a nearly 6 month old sweetheart who we are in the process of adopting (already lives with us).
I perused the miscarriage forum afterwards, and found the whole, frantic, "must get pregnant again immediately, how soon can I try again" mentality a bit much. Even if I could at some stage have another baby, (fatfamily i'm looking at you !!) I would be a bit hesitant and uncertain about it for a good while. Then, if I did get pregnant, I would be nervous, and afraid, and worried all the time and that would probably make me very moody too.
I mean everyone worries about miscarriage, but until you've seen your own baby(s) coming out of your body, (after about 12 weeks, it's a fully formed baby, i'm not talking cramps and bleeding here, i'm talking actually giving birth) too early to live, or dead already, then you have no conception of just how it affects you.
It would be terrifying to be pregnant again, even if it was planned. Once it actually happened, the fear and dread of would kick in. That's how I feel anyway.
Good luck to you, and your boyfriend, for your baby, and your future.