As an author, longterm, and decade long GM-ST-DM of several roleplaying systems, I know only 2 crucial reasons for writer's block:
It is against your real interests, which you will notice (scientifically, no occult training, nor any substance abuse, needed). Example: You feel that holding back on an idea, week later a cousin calls, mentioning she founded a magazine, or found a way to publish a fantasy adventure for pay (instead of unpaid loads of work). ;-)
The other, in my time back then, was called GM burnout. It is, when the pressure, joyous, as it can be, starts to negatively impair your health. Younger people have a habit to underestimate such, while older roleplayers had to go see hospitals and funerals coz of it.
Hints I can give:
Take a nap. Additionally learning to meditate CAN help some.
Check your nutrition for overdose of caffeine or other wake-up chemicals (red bull energy drink overdosed gets toxic).
Check similar, or ask a doctor, on lack of iron and copper in your nutrition. Sounds silly, but fatigue and loss of energy belong to the symptoms.
Ask another GM-ST-DM to guide some sessions, so you can grant yourself the time to recover and get your stuff back into the form you knew.
Let's discuss for going totally insane, becoming a roleplayer-stalking (or butchering) psycho within games like 'WoD - Slasher'? ;-)
Maybe:
https://shadowsofpindus.com/pr...ith-one-subtle-idea/