Is Loestrin 24fe Leading To Missed Menses?

hi. I've been on Loestrin 24fe for 7 months starting in October and have not received a period in between that time my doctor took me off for going on a month now in May because i missed my check up in Feb. i was wondering if this is normal and if i should receive a period ?

Also I'm 15 years of age. 162 pounds. And was put on birth control to regulate my periods.