Is it a minor pee or a proper pee Kirst? Vet said our Freddie's peeing prob didn't sound like cystitis as he does a full on widdle rather than lots of little pees. We had his pee tested and bloods done too. A trace of blood and trace of protein in wee and urea/createnine levels slightly above normal range but vet said just not enough to take any action atm.
Millie however went thru the peeing on everything stage (always close to or related to me for some reason) after her night stuck high up on the roof. Her wee showed no evidence of anything so we treated as stress related and it stopped after about 4 to 6 weeks. We put her on Zylkene. If you can get a Beavis urine sample tested (must be fresh preferably less than an hour or so but no older than 3 hours) I think it would put your mind at rest. Easier said than done I know but our vet doesn't charge much and always get results back within a few hours.
As you know, cats can't show stress by shouting and screaming, they usually go the peeing route
Could be any number of things. New neighborhood cat, not getting on with another one of yours. Dynamics within a group do change as I'm finding out atm. Noni is very much in charge of everyone, poor Dinah sometimes seems really quite scared of Freddie and Billy
and everyone seems to pick on lovely Ruby Doo who just dances about the place like a happy little bunny
All the best to Beavis and hope whatever it is clears up soon