23 days late and frustrated

i’m 16 and my period is 23 days late. i got off of birth control about 4 months ago for personal reasons. i’m sexually active, but i took a test on february 6 and it was negative. i see my doctor today and she basically said “it is what it is”. she said other than the pill there is no way to regulate my cycle. does anyone know anything i can do to help this situation? i’m really frustrated because it’s never been this delayed before. when am i going to get it again? does this mean i don’t ovulate or anything? please help