Wendy,
It does seem a little early for him to have all these problems but, everyone is different.
I had to take Bill to the hospital because of fever and neutropenia around week 5. Because of his immune suppression, he was placed in a private room and lots of gloving and masks for all who entered.
They never found a reason for the fever but he responded to antibiotics and fluids and it seemed that after his hospitalization he just simply got better even with another week of treatment, etc. I have theorized (this is just my opinion) that he had mouth sores that became infected and once those responded, he was so much better and was eating by mouth totally the second week after treatment.
Keep your chin up...it will be over soon and you will be on the recovery side of this mountain. David mentioned keeping his nutrition and fluids up...this is so important, so use that PEG to get the optimal amounts in every day (I charted it since it all becomes a blur after a while,) but also make sure he is swallowing a glass or bottle of something each day also -something that you can monitor.
Hugs, Deb