Im 17 Years Old I Never Had Good Posture I

Im 17 years old i never had good posture i noticed one day the side of my back is alittle swollen and it feels like pressure on my back and my mom describes it as looking like its pressing against my spine my doctor agreed for me to go to a special place where they look at your back come the 16th its started june 12 and hasnt got better or worse its been the same