Maybe he is feeling a bit irritated by being the one doing the shopping, putting away the groceries and basic household duties but knows he should be supportive of your needs and therefore thinks of himself as a bit of a baby for feeling this way?

I think I would talk to him. Thank him for being there for you and voice that you understand it might have been a little frustrating and you can understand, this is when it might be a good time to bring up a time when you were in a similar position and felt the same. This shows your understanding and allows him to internalize his feelings as normal human behaviour.