1. Constant fear of losing my belongings like keys, which leads me to check what's in my pocket every minute or two while I'm walking.
2. Overly obsessive about following a particular "ritual" for everyday stuff like washing my car or cleaning the house. Every small spot needs to be covered every time, even if it was previously clean. Otherwise I feel uneasy for completely irrational reasons.
3. Great confusion and anxiety when things in my job or everyday life cannot be done according to my carefully crafted plan.
Number 3 may be as well; I'm not that familiar with OCD.
That's important though... you can feel like you have something but actually have something pretty different. I understand that it must be pretty annoying for you if you are actually diagnosed but sadly, believing an internet diagnostic is too often a pretty bad decision.
I recognise your symptoms as Obsessively Compulsive.
I'm one of those people who has to hide his symptoms from everyone all the time and disguise them as "oops I think I dropped my keys, I need to go in an out of this doorway 12 times whilst checking it". I waste at least an hour of my life in my OCD rituals, and I'm all too aware of how I come across, to other people as well.
Your love for quantum mechanics might just be that, your love for QM.