dude could be a lot of reasons for this
the most obvious is your body doesn't like all the weight gain. guys hop on gear and gain 10+ pounds of slop and your bp is sky high.. what else do you expect?
this is why the proper way to play this game is set a goal to gain 1-2 pounds of lean muscle PER YEAR.
i would right now go buy n2guard. it will make you feel better and check your AI