What are these bumps?

Nichole

Two bumps popped up in 2019. I lived in a house that had fleas at the time, so I figured they were just flea bite scars once I realized they weren’t going away. Now 3 years later, more bumps have popped up and it’s starting to form a circle. Does anyone know what this could be? I’m making an appointment with my dermatologist but I’m just kinda worried.