How to end a hyperfixation?
My first hyperfixation started at age 14 and was going on strong until I was 16. Then it slowed down and I became calmer about it for a few years, but I was still thinking about it a lot. In its utmost intensity this hyperfixation was something that pulled half my focus at all times. I was always thinking about it and I often had dreams about it. My relationships definitely suffered and I struggled even more with schoolwork etc. The biggest feature of it was the daydreaming for sure.
Now I feel a new hyperfixation coming on and I don't want it. I cannot stop thinking about it, however. I'm dreaming about it. It's pulling away maybe 30-40% of my attention at all times. Worse, the daydreaming habits are coming back. I'm into fanfiction and I keep thinking of new scenarios for the show that would be fun, but I DO NOT want to do it. I would prefer to be locked in on my job and my other writing projects. I really want to nip this in the bud. I refuse to go back to the distractibility I used to have. I was just getting content in my productivity and learning to trust myself to take care of my responsibilities again.
Any advice on how to end the hyperfixation?
Going cold-turkey on it would be nice but I can't really stop myself from thinking. I might be able to get myself to stop rewatching the show but then there's fanfiction and reels. I also have to accept that I am an impulsive person who struggles to tamp down on these instincts to interact especially because I'm just craving it. Has anybody done this in a way that's mindful of that? Maybe I need to buckle down and just CBT this stuff away. Has that worked for anyone?
Edit: I am diagnosed with ADHD