Agree with Dr. Juhi's response... Need to see x-ray before advising any home protocol... Better would be to seek a therapist nearby since this would certainly require a biomechanical correction....same as manual therapy... This might even help with ur foot arch as spine is a contributing factor for lower limb
Next Steps
u would further require strengthening of entire spine and foot muscles...only once pain reduces
Health Tips
Do not do any stretches on your own as spinal deviation correction requires stretching in particular direction, can be suggested only with xray