Was just reading back through the posts, and I have to say, you're a real trooper! Having a child that's under the weather is very difficult at the best of times, let alone when you're pregnant! You're doing a great job, and its great to hear that your DH is improving a bit on his end of the bargain.
I am remembering back to when Ethan was born, and for me, I never had the blues, not even on day 3. I remember thinking I was sufferring from post-natal elation, as I was just so high and in love with him, nothing could bring me down. I am seriously hoping for a strong dose of those hormones again with this bub!
I think for me personally, the lack of tolerance is caused from exhaustion, being practically unable to bend over (to pick up the one-millionth toy...), shortness of breath etc. I also find the lack of lungs makes it hard for me to yell (ha ha - sounds funny, but a lot of the time with Ethan I am trying to explain something, like why he cannot have icecream before dinner, and he just loses it and starts a tantrum, taking swings at me, and I'm too exhausted and out of breath to keep trying to reason, so I find myself screaching at him, which I think is one step better than me giving him a smack...). Anyway, what I mean is that's me with a 3 year old who is not sick. You're def doing it tough with your little fella under the weather.
I also think that it would be incredibly difficult to have the F/T care of him like you do with just one day off. I actually feel like work is a break for me, compared to 24/7 with a preschooler. When I finish work (tomorrow, thank God) I had originally intended to take Ethan out of all his day care, as I felt guilty enough about him being in there, let alone if I were at home and he was at pre-school, but I have actually changed my mind at this point, because I think I can be a better mum for him when I am rested. Also, Ethan does really love going, and it just burns him out of energy, which is GREAT!
Seriously, have you considered maybe putting him in daycare for a second day, or maybe at least taking him to a playgroup for a day where he can burn a heap of energy and then hopefully give you a quiet arvo??
Anyway, I had better dash - I have both DH and DS in my ear wanting me to do things..... Hope Connor is feeling better soon