Title was meant to say Anyone not Everyone.

I'm 4 weeks post Number 4 and I'm finding it hard. I thought 4 wouldn't be much harder than 3, what's 1 more, but im finding it heaps heaps harder than 3. I'm too scared to take 4 out by myself. DD3 has to have her needs attended to straight away, wont wait 2 minutes for a feed or she will scream til she turns blue in that 2 minutes. I'm spending a lot of time carrying her or putting her in the carrier and co-sleeping at night. She feeds every 2 hours then it can be up to a hour getting her wind up. It's wearing me out. We have had 3 kids sick for the last week, they all have had a vomiting bug and DD2 a ear infection, which probably doesn't help. DH goes back to work on the 1st July and I'm worried how I'm going to cope. Anyone else find 4 kids hard? How do you cope when it's you against 4? At the moment I've handed DD3 over to DH cause all I want to do is sit down and cry.