Can anyone tell me what this is :(

just noticed these. I've recently been sick and on antibiotics so i figured it was just a yeast infection like I've usually gotten. however, today I've noticed these sores. they are a bit painful. never had herpes, i am sexually active and had sex with my long term partner a week ago. its just these 4 sores, and only one the one side. can anyone help :(

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This definitely looks like a herpes outbreak.

It looks like a herpes outbreak. I would see a Doctor right away.