Generally, CIS women naturally have a nice balance of good and bad bacteria in their vaginas. (pH) This balance protects against infection and the wrong bacteria from growing out of control. Douching for them, as well as us, is a bad idea. It can, and usually does, kill off the good bacteria that naturally exists in our vaginas.
Sadly, to make a quick buck, consumer marketers try to scare us and tell us we need to douche with their products. We don't! And we don't need to douche with vinegar either. Yes, right after surgery it can be a good idea. (do what your surgeon recommends) But once you're healed research indicates that you too, can begin to have a good balance of bacteria in your vagina. There is one caveat. Sadly, the major bacteria group CIS women have in their vaginas is Lactobacilli. It appears we don't create this in our vaginas. :-( Lactobacillus acidophilus is in good yogurt. I try to eat yogurt frequently to try and make sure my body has more than enough; hoping it will help.
Anecdotal: About 5 months after surgery I got Bacterial Vaginosis (BV). This is overproduction of the wrong bacteria. It can cause a white discharge and that fishy smell; which is how I knew I had it. I was still douching once a week. My Gynecologist told me that once I got rid of the BV to quit douching!!! I immediately researched it and sure enough, the top recommendation is clearly not to douche. It's been over a year since then and I haven't douched, and I haven't had ANY problems at all . . . .
I'm sure there are lots of women out their happily douching all the time. Left alone, your vagina will naturally maintain a balance of good and bad bacteria on its own and that will mean no fishy smell and no discharge. If you douche all the time, you will NEED to douche all the time. . .
FYI . . . Sorry, but perfumed soaps can mess with your normal, healthy pH balance too, causing unpleasant things like yeast infections so steer clear of them as well . . .
Take heart in the fact that your vagina is acting much the same as every other women's . . . :-)