road walker, how old is your DD?
Im a Foster carer to a 3 year old (emotionally more 2) and he is the same - clingy, sleepless nights, angry etc.
Firstly, I think you need to tackle the sleep issue. Its hard because you clearly love your little girl to bits, and would already move mountains to make her feel better, but you both need your sleep.
My advice is to pick a long weekend, and do rapid return to bed for a couple of nights. Put her back to bed if she gets out. sooth her when she cries. But leave her to it for a minute or so each time. She will not die from seperation anxiety. Its controlled crying in a way, but not so bad that you feel you are damaging the child. Be available by unavailable. After 3 nights, you should be getting some decent sleep in your own bed and the world will look better. In the day time, let your other half have some bonding time with her. ALso, you might want to look at him/her doing a night of put downs. Get yourself some earplugs and leave him/her to it.
You need to think of this as being cruel to be kind - your DD needs more restful sleep. More sleep will help her cope better with the world. And you too!
Secondly, adopt the idea that those that matter don't mind, and those that mind don't matter. There are so many critics out there who will tear holes in your ideas and your parenting and everything else. Consider whether their opinion is actually important to you. If your best mate told you you were being XYZ, then yes, be concerned. If its some random person on an internet forum? Meh. WHo cares what they think. They know nothing. They could be a 20 stone hairy handed trucker called Brian wanting to pull your chain.
Take from the internet that which strikes a chord with you - the things that make you go "hmm - I might try that". The rest is just a soap opera for your entertainment.
Finally, trust your new mummy instincts. You know your DD best now, so go with what feels right to you.