I am 16 and I have normal periods regulary but since I've had unprotected sex I haven't had a period for 3 months but I keep getting grenny coloured discharge in my knickers I've took loads of pregnancy test but they come up negative what els could it be??

If you have green discharge it's probably an infection. You need to be seen by your doctor for a proper diagnosis.

I went to the doctors a couple of weeks ago they said that it was nothink but it just keeps getting worse, can all pregnancy test be wright ?