What Is The Treatment For Bad Odor Vaginal Discharge?

Hi, I'm 20 year old sexually active (with one sex partner for the past 2 years) Recently my vagina has been releasing I very pungent unpleasing souroder. This has never really happened before. Also with this horrible odor is a lot of liqiud. It almost a clear liquid, sometimes more cloudy and dries yellowish. I need to know what o do ASAP! Please help!!!!