I have this really annoying thing where I can't stop worrying about people around me (my parents etc) dying and I know it's irrational but everytime they leave the house, I automatically think the worse and I literally have a breakdown over it. I even stay up at night worrying about my mum dying when I know she's not unhealthy or likely to or anything but I can't help worrying about it constantly, what can I do to stop this? I'm finding it really hard to cope with these constant thoughts