For the last 6 mos my menstral cycle goes for 4 days stops a day or two then goes back for 1 day it is normally 26 days and has been fluctuating from?

Hard to know. Periods could be a little erratic due to normal variation, or from some mild hormone changes. Stress, weight gain or loss, too much soy, or hormones problems such as with thyroid or prolactin can impact the cycles. Sometimes a growth such as a polyp or fibroid can cause irregularity in periods.