Are you co-sleeping with her Neenie? Maybe having her in bed for the cluster period might help you get through it because you can doze as well. And it's very likely that this will pass shortly as she gets older and her patterns start to regulate. Another thing you could do is identify does she really need those cluster feeds at that time or is she just comfort sucking? If you think she does need them, then try to bring that forward a bit and do it earlier in the night, just before you go to bed yourself but if she doesn't and it's for comfort, could you put one of your shirts in with her while she sleeps.