I Got My Mirena Out In September I Started My

I got my Mirena out in September I started my period 3 days later for about 8 days then a few days later I have been spotting on and off but in between that me and my husband been having intercourse. In October I spotted for a week when my period was due.was due for my period on the 15th it hasn't came yet I have been feeling very nauseous emotional having hot flashes... could it be my hormones trying to get back on track from my Mirena or could I be pregnant???