Hello!

I will start by saying that I'm not a doctor, but it might be worth being seen (maybe virtually) at a headache clinic by a migraine specialist to see if that's part of what's causing some of your symptoms.

"pressure on the top of my head, headaches, neck pain, vertigo, nausea, ringing in my ears, a lot of fatigue, fogginess, trouble processing, sensitivity to light" <--those are all common migraine symptoms

"It seems to be worse when the sun is out and its warm outside" <--weather changes are a common migraine trigger

"I cant wear pony tails, pins, or sunglasses hats etc. Sometimes I feel like I might black out, I see stars, I cant look at phone screens or TV screens, headlights without getting an intense pain in my eye." <--Also sounds like it could be migraine

Again, I'm not a doctor, which is why I recommend seeing one to see if this is what you have going on, but I developed a migraine disorder after my concussion, which perpetuated a lot of my PCS symptoms. Took a long time to see good enough doctors to find out that was what was actually going on. Seeing migraine doctors has been a lot more helpful for me than seeing a general neurologist or a concussion specialist was. Just a thought!! Good luck!

By the way, migraine is not just a 48-hour bad headache. Symptoms can be acute or chronic and really vary wildly. They can even include vestibular symptoms (try googling "vestibular migraine") Seems plausible you could have been having a migraine attack the time you went to the ER and developed chronic symptoms after that.