I'm sorry you were poorly too, I hope you feel all better soon.
You sound like you're ready to let him go, is this temporary because you're tired after everyone being under the weather, or do you think this is more permanent and you don't want to put any more work into the marriage?
Your husband sounds like a devoted father, which is great. Do you feel like his attention is all on them and none of it on you?
Also, I might have misremembered but is it the anniversary of BD in March? Does this have anything to do with how you're feeling right now? A year is a very, very long time when post-BD minutes feel like hours.