Until they put a new crown on just eat soft foods, avoid hard food, avoid taffy/gum, nothing too hot or cold (some soup and ice cream is fine, maybe not after each other), also avoid soda. Eat on the other side as you can.
I had one of those earlier this year for 3 months without a crown, you'll be fine, you'll just really miss crispy etc things. So no crispy shell taco being washed down with a coke, maybe have a soft tortilla one. is just fine. Potatoes are good, just not potato chips.