I'm not sure just what you mean by 'carrying a weapon' - but I think you said you're from the UK, and if you mean you carry a knife or something like that, you can be arrested for it... under the Offensive Weapons Act or something.

Also, I'm not sure if you're seeing a counsellor or something like that, but anti-depressants aren't the magic cure, and they seem to work best combined with some kind of therapy/ counselling. I'm not sure if that is what you're doing. Anti-depressants aren't any kind of 'happy pill' - you don't start taking them and are then instantly happy. It takes a while. But then, haha, I can't talk since I am so reluctant to start them. But happiness is more than just swallowing a pill every day.