Dear Doctor,I am having a semi-freak out right now and was wondering if you could help me.I am 18 years old. Never had an STD before and have been with the same kid sexually for 4 years. I recently had PROTECTED sex with someone else.Everything has been fine except that today I woke up and had light green, oderless, watery discharge. What could it be? The internet has me freaking out. Please help.Thanks, Nikki