I would suggest you to not waste yiur yime in searching of orthopedist... better search a good sports physio ...and
vitamin d deficiency is not the main reason of ykur neck pain shooulder pain and stiffness ..ratger its your occupational hazards if u r working .. excessive usese of multinedia tools like mobile,laptop,wrong food habit with awkward timings to consume...Lack of exercise...An faulty posture ... These are the few basic factors which is troubling you ...Plz never take concern vitamin d in such manner as body can regain and reabsorb it very easily even with the sun rays ...
Next Steps
coming to the next point. .mam..
above mentioned factors have broken down your muscles fiber and those torn fibers are settle down in the muscles itself creating shortning of its length ..which further creating malalignment of spinal segments .and other soft tissues...
Health Tips
so plz approach to a sports/orthopaedic physiotherapist who is specialised in myofascial trigger points release therapy manually or with dry needling and kinesiolocial taping application...u will be completely out of pain in few sessions and start sitting or walking /joging early in the morning in open field rather going to gym ..body will fulfill its desired
vitamin d..
u will be safe for entire life without using any chemical agent as in your case it's not at all in need .
rest is yours call dear
god bless you...