Susan, it will take 2 - 3 weeks before he starts to slowly feel better. Unfortunately its a very long process, 2 steps forward and 1 step back are the norm at this point. Right now Dave may sleep alot which is normal. His body needs lots of rest and keep those calories and water levels high. To heal he will need 3000+ calories per day for a long time.
After about a month post tx he should see a big difference. It will only get better and better from here on out.
Congrats on finishing treatments!!!! Let the healing begin