Other than being correct about dehydration, it is near impossible to class a concussion as severe when you already lost consciousness.

Doctors do not have tests to determine concussion severity until your GCS, Glasco Coma Score, is impacted. It does not matter anyway. You don't treat a concussion. You treat symptoms of a concussion.

Your dream irregularities could be because your sleep has been disrupted.

What are the 'more and more symptoms as time passes' ?