Wow! That 11 dpo is super dark. I've never seen one at 11 dpo so strong. You make alot of hcg girl!! Congratulations, and I'm so happy for you and hoping this one's the stickiest little bean ever. It's got to be with all of those pregnancy hormones!!
Are you being monitored by a specialist? I found it very supportive during my last pregnancy to have frequent ultrasounds in the first trimester. I know it wont change anything, but I liked making it to each milestone and it made the time pass a little faster between doctor visits.
Good luck and keep us posted. Btw, that's a perfect edd. You and your family so deserve this little gift.