My husband never had whipple or Fulforinox and every person reacts very differently to treatments. He was exhausted and didn’t have much of an appetite in the beginning but with three anti nausea drugs and very low dose steroids it helped a lot. Still only gave him one or two good days until the week off though. The two weeks was a game changer for feeling better.

@chrkuh After first session of Gem-Abraxane my husband's blood results were disastrous. He needed a blood transfusion the week after first session and three daily jabs of a booster for his white blood cells. He could not walk 100 yards; he was breathless all the time. It got better. After 3 months (3-weeks on, 1-week off) blood results better. Energy levels picked up. He has been on it for 10 months now: side effects are minimal and chemo sessions are fortnightly (and can be stretched to 3-weekly once in a while). It is a new normal but he is here with me and we can do quite alot of the things we used to do.
You may want to ask your husband's oncologist to put him on iron tablets. That will help with the red blood cell count and therefore help with the breathlessness.