He's Not Crazy.

Sounds a lot like me.
He says: “I started to cross the street to avoid grannies and steer clear of places they might be, like bingo halls and the Post Office.

“If I did pass one, it would leave me in a state of anxiety for up to 48 hours. One day I went into Guildford shopping with my mum and after being faced with two old grannies with walking sticks and curly grey hair I had a severe panic attack and collapsed.”