I'm 8+5 pg with no. 2 and I am sick as a dog. I had full blown HG with DS and when I was pg last summer (sadly ended in mc) I was pretty ill also, so I knew there was a fairly sizeable risk this might happen if I got pg again and (I thought) I was pretty prepared. Over the last week it's been getting worse by the day, though 
I'm up half the night being sick, I can't stomach most food, I'm weak, shaky, nauseous and dizzy a lot of the time and I haven't been able to leave the house for more than an hour or so at a time for a few days now.
I've got cyclazine from GP though I have been a bit reluctant to take them after mc but I'm thinking if I have another night like last night I'll have no other option. I'm supposed to be back to work on Monday but I think I'm going to phone my GP tomorrow and get a line, something I was hoping to avoid, but I can't get dressed let alone drive to work and do my job in this state!
Anyway, my main question - if you have or have had HG in your pg and you have another DC to look after (my DS is 28 months) how did you cope? I can just about get by with looking after myself as long as I stay in bed, drink water and sleep as much as I can and DH has been doing a lot but he's back to work now, my mum has DS today but she's back to work on Monday and that really only leaves me with childminder a couple of days a week and MIL the rest of the time, and I don't like to impose that much! I'm hoping (like with DS) sickness will have cleared up a lot by 13 weeks but that's still 4 or 5 weeks to go - anyone got any tips? Did your DH take dependency leave? Help much appreciated! 