Oh 212, lovie :( have a hug. Its awful, I know it is, I'm feeling like death warmed over myself, but it'll pass. It will.
What I've found works for me is relaxing in a warm bath and then straight into bed. The bath helps me chill out and then I go right off to sleep, I've found that the more sleep I have the easier the sickness is to handle. It doesn't ease it, just makes me more able to deal with it.
I've also found eating helps, constantly. I don't feel like eating so I've gotten little goldfish crackers from Tesco, you know the sort that they have on buffets? I keep a pot of those next to me and I suck them one at a time every few minutes, mini Cheddars too and plain Ritz also. It helps to knock it back a bit.
Feeding my two DCs (3yo and 1yo) has been churning my stomach the last few days so they've been getting whatever I can face making. Not brilliant but it's temporary. Yesterday they got flatbread 'pizza' (flour tortilla, tomato puree, some chopped vegetables and ready cooked chicken, grated cheese - oven for five minutes to melt the cheese), today was sweetcorn soup (frozen sweetcorn, frozen peppers, veg stock, simmer for 20mins then blitz with hand blender), tomorrow I'm palming it off onto DH.
Ditch off housework for a little while, I'm sure your DH can run the Hoover over or stick some laundry in or wash the dishes when he gets in from work.
CBeebies or a DVD for the kids, pile under a blanket on the sofa then they're entertained and you can relax a little. I know it feels like a cop out but a few days weeks of TV/DVD days won't permanently damage them, if they're anything like mine they'll think it's their birthday come early :o
Is there anyone who could take them for an hour or two to give you a break? Family, friend, kindly neighbour?