My dad is really starting to scare me. He's been saying for months that he's being followed. He thinks that all these different people (literally dozens) are following him. He doesn't even know why. When my mum asks him about it he gets angry and starts shouting and today he's scared me. He keeps saying he's gonna kill himself, shouting it. He's gonna throw himself in front of a train. Then when he starts shouting today especially I was really worried he was gonna hit my mum or something because he gets really really pent up. He's been saying for months and months that he's been followed but he won't do anything about it even if he has been followed. He honest to god sounds like a mad man when he goes on. He's filmed these so called people following him and showed me clips of a woman apparently giving a signal to a guy over the road, it's ridiculous it doesn't even look like anything - she pulled her hand out her pocket and put the glove back in. He thinks he's being monitored 24/7 his phone is being tapped and everything. But he doesn't know why. He hasn't done anything bad or like that. My mum thinks it's all the medication he's taking for problems, he has heart failure, he's in his 60s so I don't know if any of this has anything to do with his mental state. He's threatening to leave me and my mum but we can't afford to live here on our own (even with both our wages). I'm so scared I don't know what to do and it's really bringing me down hearing him say stuff like this all the time.