Weird new mark/ spot

Dulce • mommy to Ella Ocean Luna. 💕🧚🏻‍♀️ and another tiny human on the way

Hey! 6 m pregnant here. I don’t know if it’s my paranoia but I’m a little worried about a spot on my neck. I just discovered it this morning. Has this happened to any other expecting moms or is this something unrelated to the pregnancy??