On my bus ride home from work, I started having some really bad thoughts. It's thoughts I've had before but I've been on medication for GAD for about a year and a half so I haven't had these thoughts in a while. I'm nervous to express what the thoughts actually are because 1. I'm embarrassed and 2. I'm scared of voicing it, like something bad will happen if I do. But it's existential dread kind of anxiety, makes my stomach drop, and I feel like I am dying. Any suggestions on how to get out of this existential dread feeling? I'm trying to distract myself but anytime I'm free, it's there again. 

Thank you.