lady parts

Sooo I need help! I'm so embarrassed. Okay so two days ago I was masturbating and when I went to the bathroom probably 20 min later, I felt discomfort when I wiped so I checked it out in the mirror and the right side of my labia is slightly puffy. It's not too painful, I don't have any odor or discharge and it's not red or anything just lightly enlarged. I have been having unprotected sex but with the same person for a year.. should I be concerned of an std?! Or what I'm freaking out