I don't think anybody could do it on their own. :hug: Is there any chance DH could take a few days off work to sort this out with you? If you had a weekend and a few extra days there's a chance you might be able to get Evan in the habit of a new routine. It sounds like you really need DH to help you out...
You are doing a good job to manage three kids while you are pg and I hope this is just a small bump in the road!

