Hi, everyone. I'm Karen, and I work for the March of Dimes. I thought I'd post some information from our online fact sheet on miscarriage about getting pregnant following a miscarriage. Generally, most women experience a menstrual period four to six weeks after a miscarriage. Medically, it appears safe to conceive after a woman has had one normal menstrual cycle (if she is not undergoing tests or treatments for the cause of her miscarriage).
To read the whole fact sheet, here's the link: http://www.marchofdimes.com/professionals/14332_1192.asp
And, of course, you should talk to your doctor about your individual circumstance so you know what's best for you.