I'll give you some :)
I had dreadful PND with my DS, was on antidepressants, had counselling and daily visits to make sure I hadn't run off with the baby etc. It was awful. Like you, I was desperate to breastfeed but DS wouldn't stay awake so I was up every 3 hours expressing, delirious with sleep deprivation.
Fast forward 3.5 years and DS has a baby sister. I don't have PND this time and have bonded really well with both children.
I'll be honest, it did take a good few months for me to feel anywhere near normal and I didn't feel 'myself' until I was back at work and DS was sleeping properly. I got through those months by taking it a day at a time and having a plan: "Today I am getting up, getting a shower, getting dressed, getting DS up, breakfast, baby group, nap, lunch, park, nap, walk, DH home, teatime, DS to bed..." Getting out every day was important and I clung onto my routine for dear life. I also found that once I started talking about having PND a lot of women were keen to share their experiences. It seemed as though nearly everyone had had it, which made me feel as though there was light at the end of the tunnel.
Don't beat yourself up about the breastfeeding. If I could go back and change one thing about those early days, I would prioritise my need for sleep over my desire to breastfeed. The all-night expressing sessions were ridiculous in hindsight and I could really have done with DH sharing the load. Up to you but that's my advice.