Odd back pain

I’ve had back issues for over 2 years (I’m fifteen and a serious martial artist).

Yesterday my back started hurting VERY badly. This time it’s different than before, usually being in bed makes my pain worse and stretching it out/walking around makes the pain better.

Today, all I can seem to do is stay in bed. Moving at all hurts, sitting up straight hurts, walking around is the WORST. Laying in bed is the only thing I can really do, pain free.

I’m seeing a doctor tomorrow but would love some opinions.