I was taking levlen (ethinyl estradiol and levonorgestrel) for 10 years, 1 year ago i stopped & i'm yet to get my period.i've heard it takes time, but is this cause 4 concern? not pregnant

Could be: Not having a menstrual cycle after a year of stopping levlen (ethinyl estradiol and levonorgestrel) seems abnormal unless you've reached menopause. If you are still pre-menopausal, your endometrial lining can overdevelop & put you at risk for hyperplasia or cancer. See your gyn for an evaluation which should consist of labs (tsh, fsh, upt, prolactin), pelvic ultrasound, & possible endometrial biopsy (emb).