HELP! Abnormal colour! Do I have a yeast infection?

I had loads of sex with my boyfriend on Sunday and my vagina has been very irritated the passed two days, there has been whiteish discharge more than normal. I just showered and before I got in, I took a peek in the mirror to see if it was irritated and saw that my vaginal hole/opening was completely white. At first I thought this was dishcharge so I proceeded to wipe it away with a tissue. STILL WHITE. I had a shower to see if I cleansed it would help and took another look after. This time much closer up. My vagina hole is literally paper white with no dishcharge. The rest of my vagina appears normal. I do have itching and discomfort, mostly in the white area though.