I'm really puzzled and a bit worried about what's been going on with me lately. Every time I try to catch some sleep, I get woken up by this chest pain and a rapid heartbeat. It's been happening for over a month now. Climbing stairs also brings on this uncomfortable chest feeling. I'm around 100 kg and on met XL and telmisartan for blood pressure. I had a Stress Echocardiogram and CT angiogram recently, and both came back normal. I also attached my last two ECGs for a reference. I've been reassured that this isn't cardiac pain, but it genuinely feels like angina to me. So I'm kind of confused and not sure whats going on. Could this still be related to my heart in some way, or maybe it's something else entirely?

It's good that your recent tests have come back normal, ruling out any cardiac issues. The symptoms you are experiencing could be due to acid reflux or GERD. I recommend trying over-the-counter medication like Omeprazole 20mg once daily before breakfast for 2 weeks. Additionally, you can try raising the head of your bed and avoiding heavy meals close to bedtime. If the symptoms persist, you may need to follow up with a gastroenterologist for further evaluation.