Sleeping the World away

Hannah is 8 months, 3 weeks, and 1 day old today.

The past week has been a terrible mess with Hannah's sleeping habits! I don't know what to do any longer. I have totally went against things that I swore I would never do as a parent to try to fix this and NOTHING is working.

She won't go to sleep unless you are feeding, holding, or rocking her. And the SECOND you lay her down she wakes up and cries. We have tried leaving her in the crib to cry for 10 minutes at a time (something I swore I would never do), and that only makes her angry, and so upset that she can't go back to sleep because she is hickup crying.
We tried putting her to bed earlier, puting her to be later, we have a bedtime routine: bath at 8, bottle, bed. Nothing is working.
Night before last she went to bed at 8pm, and slept till 7:30am. That was GREAT! I was so happy, but this morning she woke up at 6am! YEAH! 6 AM! I don't function that early!
We put a dark blanket over her window to keep it dark in her room, and that helped for all of about a day.
She just seems to be waking up earlier and earlier. A month ago she would sleep til 9am and now she is getting up at 6am! I don't get it!
She has 4 teeth and didn't do this with any of those teeth, so I don't think its teething. She doesn't have a fever, isn't congested, has a clean diaper, full belly.
She is in her swing right now, at 6:58am. She is fussing. I don't know what to do.
Well I am going to go get her before she starts to wake up Daddy, who has to get up in 45 minutes to go to work....I hope I can get a nap today!
Thanks for reading....