I was a lot like you when I had my first bub. I would keep going with the pump until you feel that you are healed enough to give it another go. Its fantastic that you've had some more boobie feeds and that you've felt good about doing them. Maybe once you're healed you will be more confident to keep plugging along with it knowing that the 'next feed' isn't going to open the cracks again kwim?

As for how much you get when expressing, some women just don't have a lot of success with pumping and getting a lot out as babies are far more efficient at getting milk from the breast than a pump is. But it does seem like you are doing well with it. Another thing is when bubs is at the breast, we can't see how much they are taking in, but when they are given EBM or formula, we can see exactly how much and even 100mls doesn't seem like a lot, but at his age thats about all he would be having anyway. So you're producing more than enough for him.

Don't feel bad for contemplating formula either. It is so tempting and seems like an easy solution when you are are your wits end with a crying, hungry baby and sore boobs - I've been in your shoes and yes, I did go down that path, but it isn't easy at all. Maybe if I had more support it would have changed the outcome and I would have been BF for longer, but I don't know that so don't dwell on it. The main and most important thing is that you're seeking help and advice and you KNOW that you want to keep going with it and for that you should give yourself a pat on the back because it isnt easy, and there is no way of knowing how long it will take to get past this stage, but you WILL get there.