Talk to Pediatrician on Chest Pain

My daughter age 5 years facing left side chest pain from 15 days. Some time pain is svere and some time light pain occur. She also feel pain in stomach with that. No constipation . No direaha no cough or fever. Docs said this is gastric pain gave her acicon, polypap syrup, risek satch but nothing works. Her vitamin d level is also low 13.9 mild deficiency. She is active but her eating affects due to pain . Plz help me what is the reason of pain