Can Removal Of Mirena Cause Delay In Periods And Mood Swings?

I had the mirena taken out on Jan 18, was spotting when i had it taken out and spotted a few days later. My fiancee and I had unprotected sex that sat but he pulled out. I haven't gotten a period yet. But could there be a good chance that I am pregnant? I kinda tired but my three year old is keeping me on my toes, hungry all the time, and very moody.