well tori this could be discharge a sticky fluid that the comes from your vagina and is very normal, the vigina produces a fliud to keep it moist and sometimes produces more than is needed, it should be a yellow / clear coulour what i would say is that if it produces a very bad smell or a strange colour just get checked out with your doctor, but discharge is normal !
Ditto to what Vera said. Unfortunately discharge that is green doesn't leave open any possibilities other than an infection that needs to be taken care of asap. Good luck!
Sorry to say, but that's usually associated with with an infectious disease. Acquired normally through sex, but if not then possibly through some other route like using someone else towel who is infected. To get it taken care of you need to see a doctor. And you do need to get it taken care of soon. Good luck.