I'm always twitching!?

hi, just yesterday i discovered that my stomach would twitch almost all the time. it feels as though i'm being punched in the stomach with a punctuated breath when i exhale. also, my throat burns every now and then, and i get pain near my right and left collarbone. i might also add that i suffer from severe social anxiety, but i feel like these symptoms indicate something more serious. possibly GERD? other? thank you.