Yeast Infection???

it says this is my last day to ovulate but i've never ever experienced anything like this. i'm 19, i have regularly unprotected sex (yes i know) & i have been itching so much lately like insane. my boyfriend and i have never had sex with anyone else but each other. so we don't have any std's.

i had to use paper towels for a day or two. i thought my itching was that. now huge amounts of thick thick THICK white discharge is clumped and falling out of my vagina and i'm scared. this has never happened.

i need someone's take on this.