I would call tomorrow am (at a reasonable hour) and tell her you want to pick up your D at whatever time has been customary before she started pulling this funny business.
And if she continues with this, you should make it clear to her in a non-threatening way, that if she doesn't abide by the schedule to which she agreed, you have no choice but to seek that through the court. You don't want to do that, but will if you have to. And if she doesn't abide by the visitation schedule, follow through.
