Suggest Remedy For Heart Ailments

first, I have dilated cardiomyopathy and also copd. I use oxygen while sleeping. Last night after I went to bed and was trying to fall asleep, I had a very sharp pain under my left breast. I immediately sat us and this relieved it for a minute but it came right back. I ended up going back downstairs for around an hour til the pain went away. I have an implanted aicd and my last report showed svt s and atrial fibs during the last 6 months. is this something I should speak to my cardiologist about? my pulmonologist? pcp? or wait and see if it happens again. thank you! (yes, I feel fine today - just normal shortness of breath)