Thanks for trusting us with your health concern.
You have recently had a period , and changed birth control.
You might be having a fungal ( yeast ) infection , that can happen even without having intercourse.
Do not use any soap, cleanser or special agent now there.
Just clean with lukewarm water and pat dry.
Try using Monistat cream and fluconazole tablet orally.
If you are not better after 7 days, please consult your doctor to have a culture swab of the discharge.
Let me know how it goes.