A world without sleep

at least that is my little world at the moment. Cookie used to be OK at sleeping she would wake briefly twice a night to feed and that was it. since 6 mths things have changed ( i blame teething) she now wakes every hour sometimes cries for up to 6 hrs a night. Munchkin who sleeps in the room right next to Cookie finds this incredibly stressful and often vomits after 2 hrs of Cookies night time screams. Hubby has taken to sleeping downstairs in the play room ( the only room with a door that can shut thanks to modern open plan housing) . Which leaves me upstairs with a screaming baby and a nearly 4 yr old vomiting with stress.  I put cookie to bed awake after dinner bath boobie stories and lullabies. she falls asleep quickly 5 to 10 minutes of grizzles.  but by an hour and a half later she is awake seeking the ultimate comfort of boobie. which she doesn't get between 10pm and 6 am and the screaming starts.
she is 8 months and way old enough to night wean and on a good solid dinner ( meat and 3 veg) as well. we have been controlled crying her for 6 weeks now and while it has worked in the day time i am at my whits end as to what to do at night I need more than 2 hrs sleep a night. I have tried sleeping her in bed with me she still won't sleep unless she is attached to boobie. i have tried staying in the room with her while she falls asleep calmly.  but then as soon as she stirs and I'm not there  she is screaming. so now i do my bedtime routine tuck her in and kiss her head before leaving the room to let her self settle. which as i said before works well in the daytime but not at night.
Has anyone got any suggestions for a good nights sleep. because the girls in this house are very sleep deprived.