What is the meaning of 奴 this poem from 红楼梦？ Poetry is never easy to understand. 奴 is used twice in this poem. I think this 奴 means I or me, in a sense of 'me, this poor slave'.

怪奴底事倍伤神？半为怜春半恼春。
怜春忽至恼忽去，至又无言去不闻。  

昨宵庭外悲歌发，知是花魂与鸟魂。
花魂鸟魂总难留，鸟自无言花自羞。  

愿奴胁下生双翼，随花飞落天尽头。
天尽头，何处有香丘？
It is kind of 谦称 of a woman in ancient China, there are others of course

妾 or 妾身 or 奴婢 for you being the wife
奴 or 奴家 for you being the wife or general cases
小女子 for general cases
老身 for older ladies

And for men of course, their 谦称 could be

小人 for you being the servant
鄙人 for general but unofficial use
在下 for you being in a relatively lower social hierarchy
晚生 if you are younger to your friend
不才 for proposing suggestions
不肖 for referring yourself with respect to your older relatives
愚弟 or 愚兄 for closer relationship