

First of all: As a healthcare professional but not your healthcare professional: What you describe has strong signs of a depressive phase and you should first and foremost seek professional help - don’t trust the internet on this and more importantly don’t start to self treat yourself in any way besides behaviour based measures.
Secondly: It can take ages. I’ve been there. Especially when your new job is similar to the old one it is quite difficult, as you “in theory” know what to do but in reality you still have to find your place in the new company. It will take time. But it will get better.
Well, just Privateer for a non signing faction or nation then