Yeast infection!

I went a couple weeks ago to my OB for a general check up and she said I had a yeast infection. I had zero symptoms, no itch and normalish discharge. She prescribed me two pills to take. I was supposed to take one on one day and 72 hours later I was supposed to take the other but I have a horrible memory and ended up taking it the next day. I feel like I probably still have the yeast infection, so I decided to get some monistat. Idk which one to get though, should I get 1 day, 3 day, or 7??