Do NOT douche. Don't use scented soaps or anything abrasive. Douching leads to BV very often. Gynaecologists warn against it.
I use yeast infection creams to clean out the vagina if I'm unsure if its yeast or bacterial. Its a safe way to clean things out. The vagina is generally self cleaning.
It will stop feeling uncomfortable as your natural juices clean the vagina in the next few days. If you think there is still a lot of vinegar within, you could douche with sterile water that has a little bit of salt in it, that will remove the vinegar. But, really, you shouldn't douche at all. It disrupts the natural flora in the vagina that keeps it clean and safe.