So swollen😩

Okay so yesterday I did a lot of walking. I felt fine while walking and didn’t start feeling anything until I was about to go to bed. I pulled down my pants and undies and omg my vagina hurt so bad! The right side of my vagina felt so swollen. I decided not to sleep with pants on or anything because the fabric made it hurt worse. Now the next more it still feels swollen. Is this just another third trimester perk or?