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Yes, a prolonged oral antibiotic therapy would be a precipitating factor for an yeast infection.
You had not mentioned your age and whether you are having Diabetes
Diabetes also predispose an yeast infection.
First of all the yeast infection is to confirmed by examination and with investigations. Redness
of vagina, curdy white discharge or deposits over vaginal mucosa are common symptoms along with vaginal itching
Anti-fungal antibiotics by oral route weekly once for 3-4 weeks along with Clotrimazole
vaginal pessaries or vaginal gel will cure the the problem.
Inadequate treatment, diabetes and immuno-suppressive drugs may lead to a relapse.
Sex partners also to be treated simultaneously to get a better result.
Get well soon.