PLEASE HELP ME

I've Been Having A Really Pale Yellow Discharge... Sometimes It's White As Well, &' Thick. It's Not Lumpy Or Anything, Just Really Thick... There's No Odor, But I'm Itching Like Crazy. There Was Swelling As Well, I Thought It Was A Yeast Infection, So I Took A Diflucan On Monday &' It's Now Sunday... That's When My Discharge Turned Pale Yellow As Well, The Swelling Went Down Tho', But The Itching Is Still Here.... I'm Also 6 Days Late On My Period Now..