This isn’t the first time you and your child will be sick together, I assure you. Get used to it. And sometimes it’ll be all three of you. Again, get used to it. That’s just life. Sorry to be harsh but this is just the reality of the situation. You all live together. Illnesses get passed on. It’s not like you’ve just had surgery or are on your deathbed or having some horrible complication. It’s a bug. It happens.
As another poster said, what do you think single parents do? They suck it up. And you know what, as a parent I’m sure it doesn’t feel good to not be at full parenting capacity, but a day or so of phoning it in a bit on the mom front because you’re sick isn’t the end of the world. Some snacks and yogurt are fine if that’s all you can manage. It’s not like you’re feeding the baby arsenic or letting it starve, for crying out loud.
Moreover, your relationship approach troubles me. Testing him “to see what he’d do” is high school level relationship behavior. I have always, always said you cannot expect someone to meet your needs unless you are willing to make your needs known. You didn’t. That is on you, woman. Only you.
And I keep reading you say “if he were sick I would do x y and z.” Woman, he is NOT you. You cannot expect him to react a certain way just because that’s what you would do. People show appreciation in all sorts of ways and what is showing appreciation for you might not be his version of showing appreciation. And that’s fine. But you’re not making your needs known. And you’re saying vague things like “do more” and putting him through little tests. Be concrete. Give examples. Make a list. Ask for certain things. You’re putting the onerous on him to guess what you need and that’s very unreasonable.
Personally, I wouldn’t have cared if he went out. Me? I hate to be doted on when I’m sick. I’d rather just be left alone mostly. The times I’ve been sick, I’ve sent him a text and simply said “can you do x y or z for me please (make some chicken broth with egg whites, take out the dog to potty, etc.).” He’s never once not done it or complained about it at all. And on days he’s had to work when I’m sick he’s made something to eat and put it in containers for me in the fridge so it’s easy to heat up and right there in the front, set some gatorades by the bed so I’d stay hydrated, etc. Why didn’t you do this with him? You could have asked him to get a few things in order to make it a bit easier before he went out. Then you would have been set up, felt more take care of, better able to take care of the baby too, and he could have enjoyed his plans. Totally reasonable solution. He checked in to see how you were doing, so he obviously cares. But the communication here is very lacking and the expectations seem out of whack too.
I think you’re sick, feeling low, and just letting your mind run away with you, to be honest. When we’re sick we don’t always think rationally and I think the guilt of not being at 100% mom capacity is also weighing on you. I hope you feel better soon, and please just talk to him. You’ll sort it out.