Hi, My Mom Is 89 Years Old. For Three Weeks

Hi, my mom is 89 years old. For three weeks she has been throwing uo, loss of appetite, fatigue, and nausea. She says she feels like she has a lot of pflem in her throat. She was in the hospital for a few days and has seen the dictor. No one seems to know what is wrong with her. What do you think she could have and what should I do? Thanks