Amenorrhea in Teenager?

My 17-year-old daughter has not had her period for over a year, and I believe she is beginning to show other signs of a hormone imbalance, such as a flushed appearance, spider veins on her legs and face, and a crawling sensation on her face. She is also stressed much of the time. Would remedies like black cohosh, vitex, maca, or dong quai help restore her period and alleviate other symptoms? I know that these herbs are typically used for menopause, but I have read online that they are sometimes also used for teenagers with hormonal imbalances. Thank you.