Hi pineapple,
Sounds to me like you went from "sub space" to "sub drop" really quickly. I have been there and know exactly what you are talking about. My Mistress has found a way to bring me down real slowly and sort of clear my head. Some call it "after care".
I love the floaty feeling I have afterwards but Lady K always makes sure I'm okay and back on the ground before W/we move on.