The nurse said that bp fluctuates and I shouldn't worry but my bp is usually like this. I also had a reading of 118/56. I should also note that I am morbidly obese. Why my bp is so low is odd...I'm mostly worried the the numbers are so far apart. I feel tired all the time and light headed. I am going to see a endo because my thyroid is slighly high (but still within "normal" range) Anyone know what is going on?