I'm just getting into 3-d. I was told my current setup would put me in Female Hunter Class. However, when I read the description for FHC, it stated that sights can have a max of 4pins. My sight has six. Am I still FHC or do I fall into a different category because of my sight?

Four pins is the limit for FHC but it could be possible to just remove the two extra pins. On some sights many shooters move the extra pins to the bottom of the adjustment and put a little tape around them to qualify their sight.
If you are more comfortable with your pin sight I would do one of these options before moving into the Open class. Have some fun and get your feet wet.
ken12