My dad has had mental health issues in the past but now he quit his job for the past couple of months and wants to get back to work. I have just finished uni so I'm off with him most days. His thinking is very irrational, he is depressed and he gets very angry and I can't snap him out of it and he takes it out on me and my family. He is paranoid and when he believes something you can't convince him otherwise. He thinks everyone is out to get him and does stuff to harm him. We have finally convinced him to see a therapist and he sees him once or twice a week but he will have two good days where hes back to his old self and the rest of the week he will be awful.
He's been really badly tempered and irrational today and his eyes were bulging when he was speaking to me and he said stuff like 'if I hurt myself it will be all your fault' and I almost didn't recognise him. He then threatened to cancel my phone plan so I couldn't ring for help for him and blocked me from leaving my room. I then asked him about it later on and he said he doesn't remember saying it and that he didn't say it.
His behaviour is really freaking me out and clearly his therapy is not working that well. I don't know what to do with him, we all support him so much and I can't try and help him much more. I am only 21 and we have a very close relationship. I just want him to get better.
Any advice welcome.