Sleeping.

My 9 month old is a nightmare to get asleep at night. Its getting later and later her going down. And the later she goes down the earlier she wakes up. She screams the house down every night from 8:30pm. Some nights she will fall asleep only to wake 15 minutes later. Some nights it 12am-3am of constant waking and crying. Last night she finally went down at 11:30pm only to wake up at 3:45am. This is going on weeks now and i feel like a terrible mother because im starting to lose my mind. Between work, house work and not sleeping i have no patience. My husband and i are at eachothers throats. Im terrified iv giving her some form of a bad habit and now i cant break it. Im tired, i just want to cry all the time. I feel like im a terrible mother to my baby.