Recently and quite often at night I've been having a hard time where I all of a sudden experience short, rapid breaths, chest tightening/little pain, feeling like I'm not in control of it and it pretty much always leads to tears and it lasts for at least half an hour if not more. Sometime it starts when my mind thinks of a stressor in my life and then that feeling of stress/anxiety just snowballs out of control. It feels nearly impossible to pull myself out of one of these episodes