Ok I have 2 live births my daughter who make 7 next month (previous relationship ) and a 13 month old daughter for my husband. I had a Mc in Jan 2015 at 4.5 weeks and a miscarriage May 8,2015 at 5.5weeks. I haven't had a period and my levels went all the way down May 20,2015 my levels was 2.5. I still didn't get a period so I tested today and got this. How do I calculate the due date?