Why is one of my roller skate wheels for roller derby not touching the ground?

I am new to roller derby and roller skating. Today I noticed the back right wheel on my skates (2 months old) is CLEARLY off of the ground. Is this a manufacturing defect? Or is this something I can fix? Bushings? Bearings? It is WELL off of the ground. It is funny because now that i think about it, I tend to really drag and my wheels catch while turning right. help. :(