Thanks for the question and thanks for using JustAnswer.
I think this may be an issue. Vaginal discharge is not too worrisome to me in some cases. But those are usually intact female dogs with a bit of slimy mucousy discharge. Any time a fixed female dog is having white and sticky discharge I think it should be examined.
This could be a no big deal thing like vaginitis (inflammation of the vagina) which could easily resolve with treatment or it could be something requiring a little more management like a urinary tract infection.
I would try to get her looked at. Be sure you don't let her urinate before her appointment so a urine sample can be collected.
I hope this answers your question.
Yes. If you notice that she is feverish (you can check her temperature with a thermometer if you are able - normal is 100-101 or so), off her food, depressed, or squatting around in multiple spots to urinate instead of just going all in one spot.
Watch the discharge closely. If it develops a bad smell or begins looking yellow or greenish in color make her exam a higher priority.
You can use a mild antibacterial handsoap and a clean, soft warm wash cloth to keep her vulva cleansed and keep her from getting a further infection from the drainage as well.