Mommy Guilt?

Several people on FB have shared this post, and even as a brand new mom it resonated with me. Have you guys seen it?

http://www.huffingtonpost.com/glennon-melton/dont-carpe-diem_b_1206346.html

I had no idea the mommy guilt would be such a reality for me. I'm typically a pretty pragmatic person but mommy guilt I have is far more intense than I would have ever anticipated. I feel guilty about sending Nathan to a sitter, about having to supplement with formula b/c pumping 3x a day at work was getting to be too much, about spending an afternoon with friends this coming Sat b/c it's one of my full-time days with him (my DH literally had to force me to accept their invitation); I feel guilty at work b/c I'm thinking of Nathan (or posting on a baby message board :smileyhappy:); I feel guilty at home b/c my DH has had only a handful of decent meals since I went back to work (luckily he doesn't mind and never complains). The crazy thing is that no one else is making feel guilty - I've received nothing less than full support and encouragement from all of my friends and family about how I'm doing as a new mom and a working mom at that - I'm managing to heap it on myself. I don't feel depressed or unhappy, just guilty. Am I going crazy? Anyone else - working and SAHM moms - experiencing this?