6th day on sugar pill and no period??

Hey ladies! I'm in need of a little help. 
So I've skipped my period for three months and I'm currently now on the 6th day of the sugar pills but I still haven't my period. 
Should I continue with my next pack? 
Also is this normal? 
I'm not sure if it could be my cycle that's messe up since I've skipped my period so long. Could I be pregnant although I don't have any symptoms? 
Any advice or suggestions would be much appreciated!