another weird period cycle

i've always had very regular periods up until the new year. In january my period was 2 weeks late and now i have yet to start my period again. my last cycle ended on january 31. i completely missed february which i figured could possibly happen since it's a short month but now it's almost the middle of march and still nothing? My fiancé and i have been trying to conceive off and on for a year. what do you guys think? should i see someone about my irregular periods, take a test or wait it out?