K., I'm so sorry that you're feeling so down. Do you have family or friends who can stop by to help you out? I had a c-section too, and even though it was welcome after 27 hours of labor and not progressing beyond a 4, I still dealt with some feelings of having "failed" somehow. That's obviously not true, because my surgery was absolutely necessary, but I still felt that way.
You've really been through a lot, and it would probably help enormously to see a counselor/social worker/therapist. Call your OB for a referral if you don't know a friend who can give you a recommendation. It sounds like you might have post partum depression, and you don't have to have feelings of hurting yourself. If your son is more than 2 weeks old and you're still crying, please please go talk to someone. You don't need to suffer.
Have you considered having your husband give your son a bottle of formula just so you can get a bottle together? It's so hard to get that first bottle set up when they're feeding every 2 hours. If that makes you uncomfortable, have you heard of More Milk Plus by Motherlove? A friend of mine who had supply issues told me about it. It's an herbal supplement that will boost your milk supply. That way you can feed your son from one breast, pump the other one, and gradually build up enough so your husband can help take on some of the feedings. Then pump while he's feeding your son and you'll have another bottle all ready to go for next time. Getting that first bottle put together is the hardest; once you get that, you're all set for just replacing it as your husband takes over feedings. If you Google "More milk plus" you'll find the Motherlove web site. There are a few options. I bought the 2 oz. liquid, and I have to say that the taste is not so pleasant. It's not terrible, but the capsules may be a better bet.
We supplement with formula now that I'm back at work for a few weeks, and Brian loves it. It's like baby crack to him. We use Enfamil Lipil with Iron, for whatever that's worth.
Good luck, and find a way to have some time to yourself every day. Once I felt up to it after my surgery, I took a walk every single day, whether I wanted to or not. It really helped with my state of mind. Take some time away from the kids, even if it's just an hour.