I did blood work and the results were that my alkaline phosphatase was 128 when the normal was 39-117. What does that mean? Should I be worried?

No, not to worry. Alkaline phosphatase is not a very reliable test unless there is something seriously wrong with the liver. Since it is close to normal, I do not believe it is anything significant. if there was anything important going on in your liver, other tests like SGOT and SGPT will be the first ones to rise and sound an alarm.