Oh hun, big hugs to you. Unfortunately it seems to be common around that age...doesnt make things easier for you though.

My dd1 was a shocker. From around 9 months old (early starter!) until 19 months..just before dd2 was born. She would fight going to sleep, then wake up around 2 am for 2 hours..just about every night. She screamed and carried on like a pork chop. Both dh and I were at wits end. Its hard when youre so tired not to loose it. I know too that I was rough with her and ended up hating myself for it...but understanding that it was out of shear tiredness and exhaustion and love and confusion. I went to sleep school...didnt help. I know she had problems with self settling, but it was something else too...maybe developmental. 2 weeks before dd2 was born, she snapped out of the carry on and worked out how to sleep better. She wasnt great, but at least she wasnt up each night. Her sleep improved 100 fold after puting her in a big bed.

Sorry I cant give you answers as to why, but I do hope that its just a stage she is going through that will be over fast. Do you have someone to look after her while you get some sleep?

FWIW...dd2 hasnt gone through this stage....yet!