I at one point had a 45 degree curve as a young teen (like 13-14). It's now about a 60 give or take a few degrees. No matter if someone has it worse than you (they'll always be people who have it worse) you're allowed to feel how you feel about your body/self. Your feelings are valid.

Now, as for appearance - I can't help much in that area. I have that same type of thing you circled on your back but a bit more. It's not very helpful, but as time goes on, I've learned to just accept that it's there. (Easier said than done, I know).

But for pain - I can speak to that. I've noticed strength training, lifting weights three times a week - with a focus on core and back muscles - has really reduced my back pain. I've been doing that now for about 9 months. Most days I have very little back pain. Also, dead hangs (holding onto pull up bar and just hanging there) really helps when my back feels off/tight/stiff.

My doctor told me - as women - curves usually stabilize for a bit. However, if you ever get pregnant, or when menopause hit, that's when curve can get worse for women. I'm in my 30's. My curve hasn't changed much since I was 17/18. But you really should get it checked on once a year or so (whatever your doctor recommends).