I tried to donate blood today and I was not allowed to because my blood pressure was too low. It was 80/44, they checked it three times. My pulse was 68. Is this something to worry about? I will schedule a checkup with my doctor, but I thought i'd find out what you all think. I'm gave blood about 6 months ago and everyhting was fine.. I'm trying to think of what I have changed in the last 6 months.. all I can think of is, I was definitely working out more 6 months ago than I am now.. I'm active but, not as much as I was 6 months ago.. Also, just as a note, I am 5'11" and weigh 155. Not sure what to think of all this.. Any thoughts?