I recently visited my doctor re accelerated heart and tight feeling in my chest. She knows I suffer with severe pms. She diagnosed me with stress, and although yes I have stressful things going on at the moment it's no coincidence that my periods have almost stopped and my pms symptoms have changed. The panicky feelings did go away but have been hovering near the surface this week.....today is day 11. Severe pms is treated with anti-depressants, the pill and oestrogen therapy over here. At the moment I'm taking supplements only. Thank you for sharing this scary recent event , it really does help to read other's experiences. Glad you are feeling better!