Crazy thought

So starting yesterday I've been extremely uncomfortable in my pants. I wear a size 14 comfortably...to the point if I pull on them hard enough I could get them off without unbuttoning them. They are super tight and buttoning them is becoming a challenge. I'm just super bloated.  Much more so than my average PMS. Has anyone heard of hormones causing that much bloat or is this possibly an early pregnancy symptom? Note: I'm not on any pregnancy meds. Just Prenatals.