My almost 4 yr old quit eating after choking on ice cube?

he used to eat everything! now will only drink milk, juice,popsicles and broth from soups.i have tried every tactic, its going on 2 months. have been to doc.thought acid reflux. well i dont think so.v8 mixes are the healthiest he will go. everyone says will eat when ready. how long?? still energetic, bowels are regular as ever. help!!