About sexual health

I had sex before 2.5 years ago then my partner push my labia minora with his penis a after a few days i faced severe itching for 3/4 days and i itch it roughly then i get small small lumps...i wanna mention im a women and 23 years old and after that i didt have sex for 2.5 years...but i didnt took any treatment i thoght it will heal as im young so i didnt understood but the lumps are persist for 2.5 years...it doesnt cause any discomfort what is it...when he push my labia minora with his penis i got hurt as it is a sensitive part...can i get explain? I am very worried about it please explain me the best way........