So, I just had sex for the first time evr with this guy while wearing a condom about 4 nights ago. The morning after my vagina seemed very irritated and ever since then it has been very itchy. The first day my discharge was white and sort of clumpy like I hear yeast infections are but now its just creamy but there is sort of a lot. Im still very itchy and very nervous. What could it be?

Sounds like a yeast infection to me. Due to the severity of it, you will have to see a doctor for proper diagnosis and treatment.