White pimple inside labia, noticed it 3 weeks ago but flared up after sex!

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Hi guys!! noticed i had this pimple thing inside my labia around 2 weeks ago, but it was a super tiny dot then! Ive had the HPV vaccine, so i dont think its genital warts. It became bigger after sex (im pretty sure) as i wouldve noticed it earlier! its literally just a bump, ive had no other symptoms at all! no pain or anything

Looks like a polyp or cyst.