My normal blood pressure used to be like 117/76 but now it goes up and down so much like crazy and it's worrying me. I would like someone to answer that know about blood pressure. It goes from like 124/80 to like 130/86 then the highest 136/95. Then the other day I was at the docs and it said 105/95 why would it be so low on the the top and high on the bottom I'm real scared cause I heard if it drops from a high level to real low that is signs of a weakened heart. I am 18 years old by the way. I'm real concerned I am scared too :(