Down boy! You sound like Charlie Brown who has revved up really determined to "show" some balls to the Peanut gallery after swallowing up so much advice from all corners that you just plowed right ahead regardless of how it is being "carried" out all by your lonesome self in which the "ego" had the upper hand to your cool-headed Spock.
Am I right? Huh?
Slow down. Get your head screwed on right and look at this from a rational stand-point. Mind you...I am not calling you stupid or even hinting at it at all. What I am saying is that you're letting your emotions get the better of you here.
Sure...your own goal here is 50-50. From what I see here, your approach was going from 10 mph to 120 mph all in 3-days' time. Whoa! Slow down.
Mel, 3BM, Cat and others have chimed in with wise advice to transition the kids on a VERY GRADUAL basis to having more time with you. Listen to them. They know what they're talking about here.