Hi, just wanted to let you know how sorry I am about your miscarriage. I went through two in between my daughter and my son. We started trying when there were 3 years between them, and ended up with 5 years between, due to the miscarriages. :) BUT that being said, the doctor recommended 6 months the first time, and then we waited 8 months after the 2nd one. There just isn't really any explaination as to why it happened, but since I have 3 healthy children, it apparently was just one of those things that happen reproductively sometimes.
I would say talk to your doctor and make sure that it's not too soon, but usually they recommend waiting up to 6 months to let your body straighten out after the hormones.