Yesterday morning about 10am I felt funny like I couldn't breathe enough I got up I felt like my legs were weirdly light and I started panicking and drove myself into having a anxiety attack so I calmed myself down by drinking ice water and taking deep breaths I still felt like I wasn't getting enough air so I assumed my iron was low so I took my meds for that and continued drinking water and I felt better. But what's scaring me now is my heart rate has been low all day and night and now as I'm typing, it's been in the 50's and as low as 47 while sitting down or lying down and I'm nervous that my heart is gonna stop beating! It goes up to the 80's & 90's when I'm up moving around but as soon as I sat down it goes right back to 55,54,53,52,51,50,49,48,&47 and I'm scared but I must say I do feel fine I'm not in any pain I'm breathing just fine all I have is a slight headache since yesterday that's it. Can anyone help me?!