When should i call my ob/gyn? i am 4 days late and no positive pregnancy test. should i call anyways or should i wait?

Amenorrhea: You should always have permission to contact your physician if you have concerns or worries. But there are probably a hundred reasons for young women to have a late or skipped period. These include dieting, medication side effects, too much stress, etc. You girlfriends must have some insight as well since this experience is a very common part of being a young female.