First of all, you and your husband need to see yourselves as a TEAM, not a "mother/son" couple. Of course there are times you need to take care of one another, but when a child is involved, housework, bills, dogs, etc etc, you two need to be a team.
Secondly, I'm so sorry everyone is sick! Let me tell you that you will have more of these times, unfortunately! Hang in there...and as soon as your son is well again and if you don't want him being rocked to sleep every night, make sure you break him of that habit right away.
And here... here's a story that might make you feel less alone...
My now 20 month old (she was 18 mos old in this story) started throwing up the night before Thanksgiving. She had a fever, she was flushed and and was vomiting about twice an hour all night. She repeated this the next night, too. By Sunday she was fine, but then I started up Sunday night. I, too, had a fever, was flushed and vomited about twice and hour. Monday night my 3 yr old daughter got it, so we blocked ourselves off from the rest of the house in my bedroom and although I walked her through her own night of vomiting. She had it the worst...about three or four days. My husband narrowly escaped the flu, thank goodness, but wasn't "well"...he felt kinda "off". Then as soon as we all regained some strength after a week of feeling weak and tired, we all got the most amazing head/chest colds! You name it, we had it...coughs, fevers, headaches, congestion, runny/stuffy noses, etc. My 3 yr old ended up w/ a double ear infection. Later that week my 18 mos old was diagnosed w/ the Croup and a pretty bad case of it. The antibiotic that my 3 yr old was on ended the day we arrived in Michigan for a family holiday function and when we got her ready for bed at the hotel we discovered her antibiotic gave her a yeast infection. Thankfully one of my Aunts is a doctor and she had some cream for her that would hold us over until we returned home and got a prescription to heal that up. I lost my voice and couldn't stop coughing and the docs put me on three prescriptions afraid I had walking pnemonia. Three weeks later my cough finally subsided. Oh, and to top it off, in the middle of all of this my 18 mos old cut three new teeth so that added to her misery! Now in February we're finally all healthy again!!
SO! All that to tell you that moms out there DO know how you feel and can absolutely sympathize!! Hang in there, get your husband to grow up a bit and realize that he's not the baby in the house - his son is. "This Too Shall Pass"!
GOOD LUCK!!!!!