[humps]

The cause of this could be many things, but one thing is for sure: worrying about it only makes it worse.

My advice would be to visit your doctor, asks for a general round of blood tests to check everything is okay, B12, liver function, cholesterol, kidneys, etc. Do the lot. If they show something isn't normal then you can focus on dealing with it, but just as importantly, if the results don't show anything you can rule out your physical health as the problem and focus on other potential causes.

I'd place a small wager on learning you have a clean bill of health helping you get out of this slump, or could go a long way to getting your mojo back.

Best of luck!