Headaches, Brain Fog, Dizziness after Rumination?

Can it? I've had it for 5 years, not just in the background, fully severe and acutely crippling. I can hardly go through life, my memory and cognition are very poor, I struggle with comprehension and have difficulty thinking clearly or having conversations to people about everyday things. Like I can only narrate my ocd thoughts in my head, regular thoughts take too much brain power to think about. I have very high anxiety and depressive feelings also. I'm just worried my brain is structurally changed from this ongoing traumatic experiencs and when I'm in my late 30s or 40s it's going to evolve into neurodegenerative diseases. I want to get a brain scan done and see if everything is alright. What kind of doctor or tests would show me that?

Not necessarily asking for reassurance and I know I’ve mentioned this here before but my OCD has been affecting my cognition seemingly. I’ll forget small things or put things in odd places sometimes, or mix up words - things like that. Obviously this triggers me to be like “Alzheimers/dementia.” Can anyone relate? And if you recovered what did you do for it?

First-time poster in the community here, but I had something really eating at me. I’m not sure if it’s an OCD symptom or not, but I feel like my brain has developed a coping mechanism over the years, and honestly, it bothers me daily that I can’t control it. I’ve been seen as a pretty smart person by my peers, and I can be smart, but I keep getting a reaction to thinking too much. I’ve noticed that on most days, I simply can’t think. I’m not talking like “I have so many solutions to this question”, but instead, it’s more like “I don’t know the answer, and if I try to find it I’ll be wrong” or simply I can’t recall the information. However, I’ll get these waves of what I call “kickstarts” where, all of a sudden, everything is so clear to me. I feel everything that I’m numb to, and at first, I’m glad to finally feel capable. But later that day, often several days that week, the fog is lifted and all of the terrible thoughts start to flow in. I’m in a loving relationship, and she’s given me no reason to second guess, but thoughts of her finding someone better than me always show, and thoughts that I’m not good enough, with thoughts that I can’t get to shut up long enough for me to do anything even remotely productive. I believe that paired with my depressive habits, OCD has really kicked my a** for my entire life, and the mental fog that has developed as a coping mechanism bothers me just as much, even causing obsessive thoughts that I am a poser, or a fraud, of a person. Thank you guys, if you read this long-winded rant, I just had to tell someone that it was bothering me before it exploded.