Stretch mark on my pubic area?

I'm currently 33 weeks pregnant but I noticed about 2 weeks ago I started getting ONE stretch mark on my pubic area. I've never had this happen. I'm not even getting stretch marks anywhere else and my vagina isn't getting any fatter! Please tell me this has happened to others because it's making me so insecure 😭😭🤦🏻‍♀️🤦🏻‍♀️