I am a 57 year old woman , 5 foot 5 inches, 10stone, I have just been told I have the genetic condition high cholesterol, I have taken simvastatin 20mg for 2 weeks but changed to pravastatin 10mg as I was having bad dreams, I have noticed in the last few days that my stools are much softer and touch of red which I guess is blood. Should I be worried? I am also a vegetartian so have a low fat diet anyway.