Even a short reprieve can really help you feel better. Do you have family nearby or a friend to call for a little help?
Also, I know this sounds nuts but I found that for me the noise level is the thing that puts me over the edge. It’s not holding him, or not being able to do anything for myself, it’s the noise from the screaming. So, as strange as this sounds when we have really bad days around here I put in ear plugs. Then I can carry him around and the screaming doesn’t bother me as much. We just went through two weeks of this with an ear infection, meds that didn’t work, more meds that gave him a tummy ache, and then cutting a molar. The ear plugs really helped me keep my sanity.
I hope he’s feeling better soon.