mookymoo, i just want to remind you what a fantastic thing you are doing.
It's awful isn't it, that post birth bit when there's loads of tmi questions and much revealing of body parts that aren't often revealed, and all that when you've taken a physical and emotional battering, not slept properly for months (what with late pg bladder etc) and are awash with hormones.
But just remember this is all because you have done the most wonderful thing. You have created a new life. It may seem like a tiny baby at the moment, but really it's a proper human in disguise! 
And not only have you created this being from scratch (bar a few measly chromesones), grown it within you from a few cell to a viable baby and birthed them in to this big crazy wonderful world, but now you are sustaining and nurturing it with the best food that their possibly is for it, produced by your own body.
Amaizing isn't it! So if you don't feel like going out don't! If you don't feel like feeding in public, don't! If you don't feel like hiding your tears, don't!
It's early days, be kind to your self.
I know what you mean about not having anything left of yourself. I think in part this is because having a baby changes you, so it maybe hard to recognise your self. But you are there, stronger than ever, and, remember, doing a wonderful thing.
Sorry no practical advice, but it will get better. 