swollen vagina tmi

Im 7-8dpo and since 5 dpo I started to get swelling in my vaginal area it don't itch it just aches and burns some but I have ALOT of discharge I bought monistat just in case it's a yeast infection but I have never had this I wish it would go away!!!! Has anyone dealt with this was it a yeast infection? From sex? Pregnant? Please share