Good morning doctor in the house may i ask what cause watery white vaginal discharge, with odor, itching, sometimes vagina feels swollen and heated?

Infection is the main reason. Your symptoms suggest Candida, a fungus to be the cause . You can try over the counter anti fungal miconazole or Clotrimazole. Bacterial Vaginosis and sexually transmitted diseases will need to be diagnosed by your Ob/ Gyn. Avoid douches. Antibiotics and high blood sugar also makes you more likely get fungal infections.