This seems to be some sort of infection. Commonly there are three types of vaginal infections causing such problem.
1. Fungal infection
: the discharge is curdy type. Can be cured by antifungal vaginal pessaries.
2. Trichomonal : the discharge is greenish white and free flowing. Can be cured by Metronidazole
group of the medicines.
3. Bacterial Infection : the discharge is mucoid and foul smelling. Can be cured by antibiotics.
Both the sexual partner need to take the treatment simultaneously.
Please get your Gynaec check up done and accordingly you will be prescribed medicines.