Great advice above, The most important health care we can provide for our birds is prevention and self education so we are really prepared for potential emergencies. Being prepared cuts through a lot of the fear and anxiety, when you already have supplies and can just Start first aid with Electrolyte/probiotics
and possibly an emergency antibiotic for your bird when it is a holiday and the vet is not open. This provides a sense that you are in charge and can follow through. This will keep your budgie from feeling less up set from you anxiety.
Blessings, Jo Ann