Can recurrent panic attacks over years lead to low heart rate?

Hello doctor,

I had panic attacks for the last ten years, which reoccurred a few years ago. I had episodes of tachycardia during these time frames, and I have some apnea symptoms like occasional sleep paralysis, tiredness, and a sore throat. All this leads to a high BMI and poor sleep elevation, but apnea did not appear during an examination. My blood pressure is fine, and I occasionally take 200 mg of magnesium before bed, with PQQ and Ubiquinol. My issue today is that sometimes when I wake up, my heartbeat is slow, and I can hear both halves of the heartbeat. My heart rate would have been 50 bpm, but the interval between the different expand-contract is sometimes as low as a second. Is this normal, or am I just noticing this?