I looked it up and men can get yeast infections too. Here is what I found:
Men get yeast infections for the same reasons that women do, although the likelihoods are different. the main causes of penile yeast infections are listed below.
sexual transmission: Candida can be transmitted between people by direct contact, and so can be considered a sexually-transmitted disease. a yeast-infected woman who has unprotected sex with a man can infect her lover, treat her own infection, and then get reinfected next time she has sex with him. if you or your lover has an active infection you should be extra-careful to follow the safer sex guidelines until you are sure both of you are infection-free. during an infection or while being treated, refrain from vaginal intercourse, wash your hands or change your gloves in between touching your own crotch and your partner's, and keep those sex toys really really clean.
So it is possible that the reason you are not better is because you keep passing the yeast infection back and forth between you and your boyfriend.
Once you are done with the 7 day monistat you have to give your vagina time to achieve the proper pH balance. You should find out if perhaps he has the yeast infection too.