Hi our brains are weird when they get out of control it is very hard to reign them back in, things can trigger these thoughts I have a few tricks you can try, 1. as soon as a thought I dont want because it is disturbing comes into my head I press a buzzer and bleap it out it works most of the time. 2 I just say to myself give me a break I do n ot want to deal with it now i will deal with it later, and I will fix it. 3. I just try to calm myself with positive thoughts and affirmation. 4 I tell myself everything is Ok checking in on how I am feeling at the time, like am I dead no I am not I am still alive so thats fine. I think meditation does help and TLP has helped me . It is a struggle and very tiring so get lots of rest and try to switch off as much as you can . I do not drink now because I find alcohol is the worst thing for me.I do think some books help,especially ones with good endings. Hope you get help with this I am sure there are other things out there , I appreciate and have empathy with your struggle.