My zebra finch is sick. what do I do?

My little girl zebra finch is looking really sick. She doesn't have energy, she's breathing with a clicking noise, and she is poofed out and won't move. Her eyes are swelling shut and I feel so bad for her. She is so sweet and I don't know what to do for her. Help! What do I do?? She is probably going to die soon :'[