Dizzy - Im so sorry that youre feeling this way, it really take sthe sting out of what I thought was going to be the most amazing bit of motherhood...finally going home with your baby.
Please, please, please, please do NOT feel bad about giving your baby bottles, as long as she is eating is the main thing...I remember feeling so guilty (and now sometimes too!) about giving my baby bottle...I had my heart set on EBF for 6 months...but if you cant, you cant....now I am feeling guilty for feeding my baby packets/jars instead of cooking from scratch.
Then comes the colic....what type of formula are you on? Sometimes makes a difference, Is she burping well? If not, then maybe try infacol, I had days/nights/weeks of not sleeping and walking around my living room like a loon trying to put "this blasted baby" down for the night....exhausted and emotionally drained, I would fall asleep on the sofa with her between my legs (lots of cushions around us, but still, unadvised!!)
Crying through exhaustion, tiredness and the feeling of helplessness is that PND or is it just motherhood???
I agree on the sling thing and also, if you can go and have your hair done, do it, anything to perk you up and make you feel lovely is worth it...coz you are, you have just done the most amazing thing in the world...
(oh yeah and by the way, this is after VB, nothing like the trauma of ECS and still, crying and hormanal nutjob!!)