Yeast infection turned worse?

I had a lot of itching and after scratching it kind of a burning feeling with my vagina so I did the Monistat one day ovule.
Now my discharge keeps coming out really yellow ish? It was not like this before. The ovule has all melted out yesterday and today still, clear to faint yellow discharge. 
What happened??
There's very light itching here and there but I'm just concerned as to why my discharge changed so fast from whitish clearish to very yellow