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It wouldn't be unheard of to have multiple issues at the same time. Which one came first or cause the other conditions to escalate it would be hard to know.
Valbazen is a good de-wormer to use for the roundworms. Hopefully once you have them taken care of, the crop issue will start to resolve as well. I would continue with the Monistat twice a day for a full seven days. Keep the vent cleaned well. Some folks rinse the vent with a diluted apple cider vinegar once they are cleaned up and apply a small amount of the vaginal cream around the outside of the vent too.
Be sure to repeat your Valbazen dose in 10 days.
Is your girl laying eggs?
