help i recently had sex about 4 days ago. today i noticed this red ulcer looking thing near opening of vagina. its the only thing there with nothing else around it and there is nothing else that seems abnormal.

here is another picture
help i recently had sex about 4 days ago. today i noticed this red ulcer looking thing near opening of vagina. its the only thing there with nothing else around it and there is nothing else that seems abnormal.

here is another picture