Heeelllpppp!

I got a yeast infection so I went to Walgreens and got the monistat 1 and used it.. After about 4 hours and a nap I started getting lower back pains like period cramps.. is this normal because this is the first time I use monistat. The last time I had a yeast infection I used antibiotics. My period is due in a week but I feel like I'm on it with this pain