I noticed the vaginal discomfort immediately. I thought it was the sex and applied an ice bag, but once the itching and irrigation started I told my gyno and with two days of first feeling I had a yeast infection I had taken Fluconazole. My partner has not complained about anything, but it might be slight and unnoticeable. We only had sex twice before it became to painful - how easy is it for a yeast infection to spread?