What Causes Swollen Tonsils And Rash On Body?

My boyfreind has been sick for two weeks and it first started out with a fever and really bad body aches and then a the week went on he got a big white pust pocket thing on his tonsil and his tonsil was the size of a baseball. he got checked once they said he may have mono but he has a rash now and its growin on the other side no medicine isnt helping his thorat what does he have does he have aids