bp it will pass, and it is the hardest as you are fucking knackered, have seen better nights and feeding, and you are fucking knackered! Did I say you are fucking knackered? I feel as if I am poking my nose out of the far end of a pretty dark tunnel. One sleep does not make a healed mummy, but I know we are nearly there.
Soon your little angel will be past this spurt and regression, will be starting solids so feeding less, will be calm and well rested, as will you, will be rolling, sitting up, crawling, walking, talking, and you will probably find yourself right back here again with a toddler to contend with too. It will pass, and it will be so very wonderful being able to enjoy your awesome little baby whilst being relatively well rested.
You will never again sleep the sleep of a pre-parenthood person, as you will always have one ear open, but your life will be so much richer for the presence of that person that it really doesn't matter one jot.