It can be a problem to have swollen lymph nodes in the wrong places but the lymph nodes do have to be large, as the doctor said, to be worrisome. When was she exposed to Typhus? Was this recent or a past infection. The doctors should look into the anemia. Has she had her Iron test done or B12? those would be a good start. Also the RDW is usually run with a CBC (Complete blood count) if that is in range it is normal. But it sounds like she does have some kind of anemia with her ferritin that high. Also the CBC is important to see if her white blood cells are very high like 20,000 instead of under 10,000.
Hope this helps.