At 5.5 months old I think 2 o/n feeds is pretty normal. My DS was still getting one o/n feed up until about 2 months ago and he's now 18 months old! Yes I was desperatley tired but it was quicker to give him a bottle change his nappy and all be back in bed 20 mins later than to fight with him and have him crying and upset.

Ultimately you need to do whatever works for your little family. A full nights sleep will come eventually it might just take some time that's all. I have been patient with my son as I knew he would sleep through when he was ready and he did, it just took longer than I thought it would that's all.

Good luck with your decision, take care and try and rest when you can.