14F, coccyx pain, how to help it?

i’m 14 and i didn’t expect to have the pain of a 80yr woman.

i started getting the pain in about early 2025? i was bent over reading a book on a hard surface for a few hours then i couldn’t bend down properly for a long time, then when i finally could, anytime i sat up on my bed for example i would feel pain and discomfort.

fast forward to now, it comes and goes but it mostly stays. when im laying in bed it hurts a lot, and when im sitting in the car. i put a pillow between my legs while i lay down, and it only barely helps.

What do i do to make this easier on myself?