DP occurs before getting up. It is the body predicting the glucose you will need to get moving. It, typically, happens the same time each day.
Foot on the floor is the glucose release upon getting up. This is the body reacting to your movement and releasing glucose. The timing depends when you get up.
Not that I am questioning your assumption regarding DP being the cause of today's rise.
Bear in mind there are many things which can impact our bg. Did you sleep badly? Are you worried about the day ahead? Are you going down with a bug ? Did you exercise less than usual, yesterday?...