MMmmm sound stupid but the excact same thing happened to me years ago , and couldn`t get the though out of my head and resulted in me being off work for 6 weeks , couldn`t sleep ither ?

Strange and im fine now , give it the odd thought butr soon forget about it , think i may have been depressed or something who knows

Know i just think Fuck it ! Dont waste the tiome worrrying about something that i cant stop

Glad to see this post , because i thought i was the only one