Hello, I am a 19 year old female, since the age of 10 I ve occasionally had palpitations and for the last year, I ve gone through episodes where I feel like I can t take a full breath in, only little ones. It s almost as if something is stopping me, and I have to frequently yawn to get the sensation of a full breath. I m not sure if it s related, but throughout the years I ve been told I have a strange heart rhythm. It s always been rather high when stationary, often in the high 80s. I ve had multiple doctors tell me my heart rate seems to quicken and then slow down and then speed up again. I was sent a few months ago for an ECG, which turned out normal. I was just wondering if I may just have a fast heart rate or should I look into this further with my doctor? Thank you.