Wow, I feel like the worst person ever

I just found out that my High School sweetheart's mother died... a while ago. We fell out of touch, so I guess it is not my fault that I didn't know, but I feel terrible right now. I have looked for a memorial fund, or a place to donate but have not found anything specific. I don't know any of the details, and I also do not think that it is my place to find out but I did hear that it was cancer. Maybe I should just donate to a general cancer research fund to set the world back into balance.