Can no longer lift weights

Hey, folks. Long time reader, first time posting. Post Concussion Syndrome. Been dealing with it for just about 2 and a half years now.

Had a change in jobs recently with about a two month window inbetween that I took to try some new recovery methods.

Three months ago I was working an extremely physical job carring heavy loads all day then working out 3 to 4 times a week in the gym. (This would flair my symptoms but not destroy me).

Now, after a short two week break from lifting I've noticed my tolerance for physical tension is dropping lower and lower. I cant even do a few reps with a very light weight (4-8kg) before my heads tense and my mind is fogged.

The worst part is, these brain fog symptoms can last way past the workout itself. Sometimes even 3-4 days.

Really sucks. Guess I'm writing to see if anyone else has had a similar experience.