You may have a Candida infection. This is a type of yeast infection that is marked with a cheesy-like discharge from the vagina. Try using some Monistat medication that you can purchase in the drug store. If the infection or discharge does not clear up within 5 to 7 days, you should see your doctor. If you experience nausea, vomiting, fever, or chills, go to the doctor right away.
It sounds like a yeast infection you will need to see the dr.
You may have thrush which is nothing to worry about your doctor can give you a tablet to clear it up. I get thrush a lot due to heavy periods and tight clothing. There is no evidence that thrush can be passed on through sex so don't worry. You may just get heavy yellow discharge if you are about to or just come off your period. I would get treatment for thrush if I was you and don't wear thongs or anything too tight because air needs to circulate. Only use water to wash your virgina because soap can irritate. Hope I have helped