Hi friends iam having the uncomfortable panic which coupled with some pain just under the rib of left thoracic?

hi friends iam having the uncomfortable panic which coupled with some pain just under the rib of left thoracic not in right why this is so iam not able to focus on my work feels low on energy iam 5.5" ft with good stamina may i know the reason is it any danger disease symptoms, how can i overcome this whom the specailist i need to contact please help me .......