Breaking rules meltdown

I am compelled to 'do the right thing'.   It's very deeply ingrained into me and i strive to be perfect in everything I do.  if I have a negative interaction with people or am not sure if I have behaved correctly, it troubles me to the point that I can't sleep.   I will process it over and over again seeing if I can be judged to be 'at fault'.

For example - A few years ago, I sold a car on ebay - it had a slight overheating fault - nothing terrible - I've been driving it like that for 6 months.   I did an awesome advert, lovely pictures etc. - but clearly stating 'spares or repair only'.

A guy bought it, came to collect it and thrashed the *** out of the car as he drove off down the road.   I was concerned.

I got a nasty e-mail from him in the evening claiming I'd mis-described the car as he'd blown it up on the motorway.  After an exchange of e-mails he backed down.  I had done nothing wrong.   I re-read my advert over and over - and it was all absolutely clear.    Did my superb advert cause this muggle to read more into it than was actually there?

It upset me a lot - it took a year before it wasn't intrusive in my mind.    It still bothers me - it's just another of the many little things that I get to reprocess in the small hours when my brain decides to wake me up for a laugh.

I appreciate your reply it makes me feel less alone in this struggle. 

Things will go round in my head for years and years.

The thoughts hit me at unexpected times

I wonder if it's an autism trait? 

I appreciate your reply it makes me feel less alone in this struggle. 

Things will go round in my head for years and years.

The thoughts hit me at unexpected times

I wonder if it's an autism trait?