High Fertility

Kim
I was getting the Depo Provira shot for two years. I've had two periods since being off. Prior to BC I had regular periods with a 28 day cycle.  Now I'm not sure about my cycle. 
I've been using the clear blue ovulation tests for a week now. I've had 5 days of High Fertility. Does anyone know how many high fertility days I'll have before I get a Peak Fertility test?