(CW OCD) Twice in my life I've become helplessly obsessed with a given topic to the point that nearly everything I saw, heard, or thought about would build a new association back to the topic, forming a feedback loop. The first time it lasted a year. No one could tell because I was just acting like a weird teenager to them, but it was hugely debilitating. I couldn't get off the ride. The second time, maybe fifteen years later, I had since researched the condition. I recognized it was recurring with a new topic and managed to stop it over several straight days of deliberate, flashy distraction. By that time I had sought and found professional help, from which I learned quite a lot more. As far as my coworkers knew, I just took a few sick days. They didn't know I was struggling for sanity. I've been in good mental health for many years now, and I'm prepared.
There are things no one can do for us and we must face ourselves. Only you can take a first step to seek help, or step back onto a known healthy path. Thanks for starting this conversation.