You think thats paranoia?

You'll discover real paranoia when you see clouds of blue smoke coming out the back, constant 2 bar oil pressure above 2000rpm, tractor sounds coming from under the bonnet, and almost cutting out when idling.
Then you'll realise like I did that all these symptoms magically disappear if you just leave the car for a few hours and come back to it later.

Then nobody believes they happened at all and you start to wonder whether you've been hallucinating

I'm not mentally unstable!