Post mirena or pregnant

I had my mirena removed back in September and in October I had a long period. Since then I have had every symptom, swollen breasts, fatigue, hot flashes, constipation, indegestion, spotting etc. Glow says I’m 4 days late and I am getting BFNs. 1) could I be pregnant or is most likely my hormones from the mirena removal? 2) am I really late due to a 2 week period last month?