Thanks for your help Mark,

Sorry if this is just my anxiety questioning your valuable input

I just wanted to clarify that although I did drop the weights to the floor, I didnt fully let go, so some of the force was transferred back up through my arms and neck, so I felt the sensation in my brain/head area and whether this shockwave or whiplash was enough to jar/jolt my brain and cause an actual concussion?

I've been off work since Wednesday and balance/procioception was more noticeable yesterday while driving and in crowds - although I admit both of which cause me anxiety.

I also started taking sertraline last Monday.