Vaginal Discharge

So I’m on Birth Control and my Nurse Practitioner said its normal to have a vaginal discharge while I’m on the pill.

However, it is very heavy and it dries yellow. There is a slight smell but nothing obvious.

I don’t have any Stds and I’m not sexually active. I don’t think its Bacterial Vaginitis or a Yeast Infection (unless I’m mistaken)

What could it be?