Stinging in my right boob

Jasmine • 26 💗 happily taken by my love of 3 years💍 mommy to veya 👶🏽❤️

This morning when I woke up I thought maybe I had slept on my boob wrong or something, but it has been stinging since.. on and off I’m 28 weeks and 3 days.. it’s kind of painful and annoying anyone know what it could be?? Should I contact my ob? I don’t feel like it’s an emergency.