I'm sorry I only read a little bit because I'm struggling to read, but it sounds like you need a second opinion. Hopefully that will clear up any doubts you have.
I'm also surprised you were given a sz label if you're prodromal, because sz is a serious label to have and prodromal symptoms could be anything, as you suggest, so if I were the professional I would watch and wait to see how things develop rather than slap a serious label on you that might be wrong, but that's just my opinion.
All the best
*Willow*