3 month history amenorrhea, neg hcg test. u/s neg for endometriosis & cysts 6 months ago. stopped oral b/c (nortrel) 8 months ago. where is my period?!

This needs an eval.: Multiple reasons for three months of amenorrhea: something affecting the messengers from the brain to the ovary, something affecting the ovary itself, something affecting the uterus's ability to have a menses (this latter is unlikely given that you had periods up until three months ago). To properly figure this out, you will need to draw a number of hormone labs. Best to see a gyn.