I have a 13-14 months old who nurses all night long, i.e. on average every hours. At best I get a 2-2.5 hours stretches. Here is more about our arrangement:
Most of the time we bed-share a queen bed. We also have a co-sleeping bassinet attached to the bed, but b/c I find it very inconvenient to nurse b/c it's not possible to get it even with the bed and also b/c it puts me in a uncomfortable position while nursing and wakes me up completely. Our baby is between my DH and I. Our baby sleeps on top of the covers; he won't even have his feet covered... he kicks them off which is fine, I prefer it that way.
I am in the process of reading Chapter 6 of Sears' The baby sleep book : the complete guide to a good night's rest for the whole family which offers suggestions. I had never gone bare all night until last night which helped a bit despite my being a bit chilly since it's winter and I fell back asleep uncovered to my waist.
His incessant nursing is starting to get me sleep deprived; my nipples are doing just fine, but sometimes he won't latch off and it drives me nuts so I unlatch him which is not a problem with the baby. I do try to nap with him, but often he doesn't nap more than an hour so I wake up more tired than before if I get a chance to fall asleep. I do try to offer comfort by drawing the baby close to me or giving him a pacifier before offering my breast to see if he will fall back to sleep that way, but so far it hasn't worked very well; he is addicted to the breast... he is a boy after all
He is a bit gassy which was a major issue when he was smaller. However, it is manageable. There are no physical reason for him to wake up as far as I can tell. Not too hot or cold, not too dry or humid...
That's all I can think about writing for now. I'll keep reading that book when I have energy, meanwhile I'd be interested to read if anyone else is having or had this issue and how they deal or dealt with it.