sub drop doesnt nes have to occur after sub-space... it can occur at any time. for example when your Dominant partner has to go away.
I can remember experiancing "sub-drop" after S1 went back to AU the 1st christmas he came to stay with us here in the UK. Was awful having to drop him off at Heathrow Airport so he could catch his flight home. I cried all the way back up the motorway and then bawled again as soon as I got to work.
The worst part was coming back home to an empty house and also going to bed alone. I felt betrayed, alone and not wanted.
Only after he landed back in Melbourne and contacted me was I ok.
I never want to have that feeling ever again.
cg