Hi everyone, this is my first post so apologies if I ramble!
My DD was born in February, DH had 4 weeks off work when she was born and in that time he was great. DD would not sleep or be put down on her back so it was a bit of a nightmare, but we muddled through together. As soon as he went back to work though things changed. He refuses to do night feeds during the week and instead sleeps on the sofa so he is not disturbed during the night (I have to have the bottles and steriliser upstairs too). He works every other Saturday morning so doesn't do night feeds on the friday night before then, so basically will just do a Saturday night. He leaves for work by 7am and is usually home around 6, so when he comes home he sits down to chill out so won't take the baby straight away, he has cuddles with her for about half an hour just before I take her to do bath and bed. He has never offered to bath her or put her to bed himself, has only done this about 3 times but only because I've asked him to (and he huffed about doing it then)
Last week DD hit the 4 month sleep regression so for 3 nights was up every hour, before going back to her usual up twice routine. On Wednesday I told DH how exhausted I was and rather than offering to help his suggestion was to ask my sister to come over and watch the baby while I slept (my sister lives 40 minutes away, doesn't drive and has 3 kids of her own). He also text me the next day to say I need to get someone to look after her so I can sleep as he's sick of my attitude and comments towards him. He said he is exhausted too with working and doing night feeds on a weekend. Told me not to take my tiredness out on him.
I understand that he works hard and I don't even mind doing the majority of the night feeds, but AIBU to expect him to at least do bath and bed, and help out the odd time during the night when she's not sleeping at all? I may not go to work but it's not like I have all day to relax and catch up on my missed sleep! 
Advice needed please!