I'm with you on the being terrified of a twin pregnancy, although twins do run in my family, and they have skipped two generations, so someone is DUE. LoL
I would love twins, with the exception of the incresed risk of complications. Would love the babies, but losing one or both, that would be awful. Plus, my first pregnancy was so filled with multiple complications......<shudder> (then, there's the double expense that twins bring!) A friend whose son is the same age as my son was expecting twin girls in December. They just delivered 2 months early, and one of them died a few hours after birth. So heartbreaking.
I, too, have heard that women are more fertile in the first few months following a miscarriage, but then, I always thought "more fertile" meant more likely to conceive rather than more likely to have multiple ovulation. Maybe I was wrong. Very interesting, either way.