Tightness in Chest

Ever since my 3 week round of being blasted with antibiotics I have dealt with tightness in my chest. My upper chest cavity feels tight inside and it is stressing me out terribly. There is no pain, just tightness. Tonight it is particularly prevalent. I tried taking an antacid to see if the culprit isn't indigestion. I hope this gradually fades away. I don't want to have to go to another doctor for another problem.