I am 23 years old and for 2 months i have had no period. I went to the doctors last month and had 2 pregnancy tests and they were both negative. 2 days ago i started to have a very thick dark brown nearly black discharge it has stopped now. For over a month i have been getting abdominal twinges and a clear fluid coming from my nipples. Some mornings i wake up and feel like i have a hang over....which is strange as i dont drink. The doctor has told me to wait for another 4-6 weeks its too worrying to wait.