Due to anxiety, improper breathing is causing chest discomfort and buzzing pains in chest and stomach. any medication to ease symptoms n avoid attack?

Lots of meds: address this, but for those you'll need a psychiatrist. The usual ones are SSRI's or SSNRI's, and there's a long list. Have you also considered the CAUSE of your anxiety? Meds will help cope in the short run but won't address the underlying dynamics, other than adding a little confidence with symptom reduction. Here's a reference: http://www.psychologyproductsandservices.com/page2.html