"Shaky" After SB? What is Going On?

I just received my new lockable leather and fur wrist cuffs. Naturally, I put them on immediately! They felt wonderful. I secured each cuff individually, then locked the pair together with an extra lock, placing the keys nearby while I lay on the bed.

After struggling a bit, I drifted into a light trance, daydreaming about different scenarios involving my girlfriend (a habit of mine, haha).

Twenty minutes later, I decided to release myself. It was easy since the keys were within reach.

But before climbing off the bed, a wave of emotion hit me. It feels somewhat like fear; I’m cold, slightly trembling, and my knees and shoulders feel weak.

Has anyone else experienced this? Do you have any insights?

It’s been an hour, yet the sensation persists.

I find it puzzling because I’ve worn chain cuffs and rope in similar positions before without issue…

Help!:)