Hello, You have not mentioned any past illness of your girlfriend or yourself. Anyways, it appears that your girlfriend is suffering from some kind of fungal infection. Yes, for best effects it is better to treat both the partners. Since you are experiencing side effects of fas kit you may stop taking it. Your girlfriend can continue to take it if it suits her. You should inform the reaction of the medicine to the treating doctor so that the medicines for you can be changed. If you do not have any issues with Fluconazole you can take a course of oral Fluconazole. Avoid sex for a couple of days. Both partners should take care of their hygiene. Take regular showers at least two times a day and keep your private parts dry and clean. Wear loose fitting cotton clothes. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician