I'm 42 an just had a miscarriage at 8 weeks, devastated. Doctor has cleared us to try again and we don't want to wait a year and a half to conceive again. That was hard in it's self, I had my daughter at 40 years old and it only took 2 months to conceive her. So I am setting up Glow to help us and don't know what date to use for last period. Would I use May 16th my actual last period or would I use July 17th the day the D&C; was done? Or do I need to wait for the next period to happen?