Oh bugger Well if you're no better tomorrow then ABC2, dvds for DS whatever he likes snuggle with him with snacks and drinks on the couch. It's ok to let them be complete TVholics when you need the rest I think. I know how you feel, I've not been an attentive mummy either the last few months with the HG, MIL is doing most of DSs care while DP is at work, but they will be ok in the end.
Rest up Did they give you anything topical to try and ease the itch and burn? Didn't LMS say she used calamine and it helped a bit. You can go insane with that kind of rash