Thanks for your question on Healthcare Magic. I can understand your concern. No, vitamin D3 deficiency can not cause this kind of severe chest pain. Most common symptom of vitamin D 3 deficiency is bilateral lower limb pain. And after 3 doses of vitamin D 3 you are still having chest pain, so in my opinion we should search for other cause for your chest pain. Better to get done ecg, 2d echo and chest x ray. If all these are normal then no need to worry for heart or lung related diseases. Apply warm water pad on affected areas. Take simple painkiller and muscle relaxant drugs. Wear rib belt. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.