Greetings, sorry about your body pain.
Your description is incomplete, yet I will consider different scenarios and will give you solutions.. Your pain is due to tight fascia.
Next Steps
you need to see a posture correction physiotherapist near you plus a myofascial release massage done by the physio this will help relieve your pain plus loosen your tight structure. having muscle and other structures very tight will cause pain. doing exercise based on physiotherapy advice will have strong muscles and will help have good posture.also help you gain height if possible.
Health Tips
if any doubts do let me know