I am a 26yr old female with irregular menstrual cycle. So I am not sure of my ovulation period. But for last 3 months my periods were normal cuming in?

Evaluation. When your periods are irregular, you should have a proper evaluation. Every month i see young women under age 25 with irregular periods and it turns out to be the beginning of early menopause. So when periods are not regular there are a number of simple tests that should be done to rule in and rule out certain problems.