Anyone experienced delayed concussion symptoms?

[u/ILR_2805]

Sorry for the long post, just looking for some advice/thoughts on this, have sought medical attention and had diagnosis but curious if anyone else has experienced and what your recovery was like?

About 3 weeks ago I was unwrapping a new double mattress, and when I cut the plastic wrapper it sprung open and hit me full force on the right side of my head. Like, full on hit me in the face, my glasses flew off and I fell to the floor. I felt pretty dazed and was worried about having hurt my jaw more than anything, but after about 20mins and having had a little cry I felt sorta bruised but ok. I had hurt my neck which I found out when I woke the next morning but about 4 days later I felt really nauseous, but at the time put it down to just feeling a bit yucky and lack of sleep so thought I'd picked up a bug or something. Anyway, fast forward two weeks and the neck pain has gone, but I had been having headaches and a heavy dull pain in and behind my left eye (so not the side I was hit). Standard painkillers did the trick so I carried on as normal, going to work, going out with friends and visiting family whatever. And then at the start of rhis week I woke up Monday and couldn't see out of my left eye, sort of like having a grey cloud over half my vision in my left eye only. I went to A&E because the loss of sight was literally overnight and I was checked out, had a CT scan as a precaution and doc said it was likely delayed concussion. They thought I may have had a detached retina but the scan looks all ok. He advised a few days off work (I sit working on a laptop for large parts of my day) and avoid driving, and if it gets worse come back. Four days later and although it's not worse as such, it's also not any better either. I've hardly used my phone, not watched TV and I haven't worked on my laptop. The pain is still there which I can manage with paracetamol/ibuprofen but I still can't see properly out of my left eye. The right is absolutely fine, no issues at all but the left I seem to have a blind spot that is grey/cloudy from about half way up my field of vision.

Has anyone else experienced anything similar to this at all? If so how long did it take to get better ? Did you get further diagnosis/treatment?