I don't get my period?

Angie
I've always been a late bloomer and hardly ever get my period. I began my period forcefully through taking birth control freshman year (I am now a junior) because I would never get my period, I would only get a brown discharge.
 I stopped taking birth control after a month as I was insecure of gaining weight etc. and I got my period during that month so I just assumed I would get it normal like every girl... Every month. Unfortunately, it didn't work that way and I just forgot about getting it plus no cramps, no pain right?
I am now a junior and haven't gotten my period since freshman year I only get a brown discharge but that's just sometimes.
Honestly what should I do? I'm really scared to see my Gyno because my mom would be there and I wouldn't want the Gyno to say things that my mom doesn't know about... HELP