Back pain relief tips?

So, I’m wondering where the best spot is to get my spine checked out because my back and knees have been absolutely killing me after workouts lately, and honestly, is it even worth paying for a private specialist or should I just stick to the usual route?

Hmm... how can you be sure it's your spine? Where exactly are you feeling the pain?

Lower back and knees are killing me... but I’m hitting those posterior chain muscles hard, training Taekwondo six days a week, and I’m sitting here at 222 lbs and 6'4", especially since I didn't do anything active or even stretch for years before this sudden burst of energy, so I just let myself go completely, you know? Is this kind of reaction normal? I'm 30.