Hi Soph - well, seems to me you're in a bit of a muddle. First of all you really shouldn't go googling - most of what you'll read is absolute rubbish & if it's serious medical stuff you won't properly understand so no need to do it! Secondly, you're very young & the chances of your having anything serious is virtually nil. What I would do if I were you is make an appt. to see your GP just to put your mind at rest. 

The reality probably is that your hormones haven't yet properly set into a pattern & the discharge you describe might be perfectly normal for you. 

Please don't set off down the road of being anxious about your health - you're young & should be enjoying yourself & not worrying about things like this :) I don't mean to rubbish your concern so do see your GP but try to keep it in proportion! x