L.S.
Here's a great big hug for you!!! I am so sorry you are having all these problems.
First - you need some tender-loving care. You are depressed and you need to take care of you so that you can be the best mom you can be. I have had ppd with all my kids. Get some help for that from your doctor, or some kind of support.
Second - If you want to breast feed your dd, you need support there as well. Seek out a consultant or the La Leche League. The hospital you gave birth in will have consultants you can call. Get her to nurse any way you can. Pumping will not increase your supply, nursing will. Eating oatmeal helps; fenugreek, blessed thistle, mother's milk tea - all herbals that will help supply issues(www.kellymom.com)
Third - there are a lot of parenting websites out there - www.babycenter.com is one of my favorites - they'll send you monthly e-mails regarding development, etc. Find ones you like to get you up to speed on your little one's development.
Lastly - if you can't nurse her, don't beat yourself up over it. Your daughter needs her mama happy and healthy. If it causes too much stress then just stop, knowing you've done the best you could.
YOU ARE NOT ALONE!! Email me if you need to and I'll give you my phone number, you can call me any time.
God bless you and keep you close,
L.