I think Gizmo is smart enough to know that you are not up to what he would usually expect of you. These little ones are very smart. He has noticed the change in household activities. Maybe his looks just indicate how curious he is about how you are feeling. Does he come up on the couch and snuggle with you?
When I am well Gracie always expects her 2 walks a day to be carried out at the appropriate times of day. The only time she doesn't get to go is if it is really raining hard....like today or too much snow. I try to let her know the weather is too wet but I guess she thinks she is part seal or something. She will give me the "looks" and even bark at me when the appropriate time passes and I don't get the leash out. They can really make you feel guilty.
Usually if I am sick or in pain she knows it and just becomes a different dog. She snuggles in and will stay right next to me most of the day. I will throw the ball for her now and then so she gets some entertainment but she doesn't give me the guilt trip that she would ordinarily work on.
Maybe make some room for him on the couch with you and let him do his nurturing job. I'll bet he will be very good at it. Gracie has been like this since she was quite young. It is amazing to see because she is usually very active.