G.R.
Just wanted to let you know, my now 3 month old son did the same thing. We took him to ped for it and he was diagnosed with reflux. Reading your post, I can totally relate. His started right at a month old too and it was so so loud in the middle of the night that my husband and I would take turns sleeping out of the room bc it was impossible to sleep through! And he was extremely squirmy too! Once he was diagnosed, I did some research and found that there was an overwhelming amount of connection between newbees that grunted and squirmed at night and reflux. He has been on Zantac since he was one month old and he is doing much better. But I was such a zombie during the day trying to take care of him and my 2 yr old. You might want to check into that and see if maybe that's the cause. The way you describe it makes me relive it! It's sound identical to what happened to me. I hope you get some rest and are able to find out what's going on. :)P.S. You might want to ask your ped about putting baby to sleep on tummy or side. I know it's not recommended and you should do what you are comfortable with, but I will tell you that I tried it and it was the first night I got 6 hours of sleep. HTH! :)