5 mn old has had HORRIFIC congestion for 2 mn now. She had RSV mn ago, been to dr weekly, O2 stats range from 91-97% she wheezes, vomits occasionally and pee smells metallic. Other than breathing issues she is happy. We section, saline, humidify, elevate bed, administer albuterol but nothing helps. She is fed Similac Adv. I am at a loss. Could this be acid reflux?