I keep reading that to calculate your due date/how far you are, you need to know the first day of your last period. This is where I get lost....
March 25th was the first day of my last period.
April 24th, I started spotting and I spotted for 4 days.
Which one would I calculate from? March 25th?
Your OB will likely do a dating ultrasound. If you think the spotting in April was a period, then I'd go with that date, but if you think it was something else then I would use the March date. When is your first appointment? I'll be curious to find out when your EDD is.
I agree with Anna. Your OB would do a dating ultrasound to confirm either dates. When I was pregnant with DD, I still had spotting which could be confusing. Keep us posted on what you find out! And, congratulations!
TTC #3 since January, 2011
DH Trevor, married 08/2005
DS Aidan, 12/31/2006
DD Ainsley, 06/26/2010