Could I be pregnant?

Hey,

My last period started on the 14th of November and lasted about 5 days, it's now the 29th of December and I'm starting to wonder whats going on. My monthly cycle is usually kind of unpredictable so the past few months I've been counting the days and its usually about 36 days but now its been 45 days and still no period? Also last week I had symptoms of my period like a bit of cramping so I thought I was going to get it but I didn't? And also the past few days I've been feeling more tired then usual and feeling a bit sick a few times but not always in the morning? Could I be pregnant or is it too soon to tell?