How Can I Be Sad?

I recently started following a page on fb--the page of the milk bank where I donated. I think I have to un-follow.

Every post I see makes me sad. Sad that I didn't do more. Sad that I didn't keep pumping longer--for them. I think I'm past sadness that Precious/Thing 2 never got to nurse again after surgery. She makes me too happy to be sad about that. I'm okay with how long she got breastmilk.

The timing made sense for stopping. It was a gradual wean from the pump and I had no problems.

But I'm good at making milk. Even if I had taken that week away from the pump when I was at the youth gathering, I could have resumed pumping as I still had some milk for quite some time.

Why does it make me so sad that I only contributed 285 ounces. It's such a small drop in the bucket for babies who need it. I could have done so much more.

And I'm sad.