Hi everyone. This is just an update to my last post. First of all thank you very much to everyone who replied to my post. It does help to get advice from other people who are in a similar situation to me. I followed the advice I received and visited my GP. To cut a long story short, she thought it best that I went to A&E. Better safe than sorry. I spent about six hours there. I had blood tests, Ecg's, and chest X-ray's.. They couldn't find anything amiss. I was sent home. Hurray!! I was feeling better that day anyway so I was happy at this result. This morning I was still feeling ok. I had my meds at 10:00. Then gradually the old feelings/chest sensation came back. Dizziness/nausea, very slight irritation in my chest. Dam.. I have noticed that my heart rate is quite low when this happens. It can go as low as 39bpm. It's normally around 60bpm resting. Over a day it averages out at 50bpm according to my Garmin vivosmart watch. I'm wondering if the Beta-Blockers are causing this. Maybe since my heart is getting more oxygen now, I don't need the Beta-Blockers. I have an appointment with my GP next week. I'm going to suggest cutting the dose. Does any of this sound familiar to anyone?.. I'm feeling really spaced out at the moment. Once again, thanks in advance for any replies..