Is it okay to douche?

It is not necessary to douche at all.  Douching can lead to changes in the environment of the vagina which can lead to infections such as Bacterial Vaginosis (BV) and yeast infections.  The vagina is a self-cleaning organ.  Also, if you already have an infection in the vagina, douching can spread this infection into your uterus and pelvic cavity.  If you notice that your vagina has a foul odor, you may have an infection.  This should be evaluated by a health care provider.