irregular periods

I have been on birth control for the past 14 years or so. Before then, I remember my periods were irregular. I have had no problems while on the birth control and my period was predictable with the pill. December was my last pack and if my cycle followed normal or close to, I should have started my period January 19. My husband and I had sex during a possible ovulation day, but I am not feeling any symptoms of being pregnant or starting my period. Should I wait a couple more days to see if my period will continue to be irregular or just go for a test?