Mr. Gavin still not sleeping

So his sleeping through the night was a fluke and has not been the trend since. He got up at 9pm, 11:30pm and 4:45am. I am really going to have to start cracking down on the sleep training. He is 20.5 lbs, there is really no need for him to be eating in the night. So I think I am going to have to suck it up and deal with his crying to get all of us some more sleep.