TikTok star Megan Eugenio -- AKA "Overtime Megan" -- is adamantly denying she took a picture in bed with Antonio Brown ... saying flat-out, the person in the snap "is not me."
A picture of the controversial ex-NFL superstar laying alongside a mystery woman made the rounds on social media this week ... which appeared to be a post on his personal Snapchat.
Given the person's appearance, fans of the sports personality initially speculated Megan was the one cozying up with A.