Hi Ladies

I've just found out I'm pg with #2, a bit of a shock since #1 is only 4 months old and still completely breastfed, 6 feeds per day. I didn't even know I was ovulating, and haven't had a cycle since April '08 (half my luck!)
Problem is, I have no idea how to figure out how far along I am. Have booked in to see my ob in a couple of weeks, and she'll do a scan, but I'm not sure I can wait that long. I know it's not far along, as the line on my hpt was pretty faint, and I had an implantation bleed last wednesday. Does anyone know if you can calculate your due date from implantation bleed? I never had one last year, so can't use that as a reference.

Also, does anyone know if the incidence of miscarriage is any higher while breastfeeding? Have had a couple of people tell me I should wean DD onto formula, to give the new pregnancy the best chance of survival, but my maternal health nurse said that was a bunch of hooey! Any advice would be great.

thanks for any help in advance xx