I really do understand your anxiety; I felt the same way initially and it took time to get used to taking my boobs out in the same room in which I might have an important meeting.
1 in 2 people can kiss my a**. Gosh that makes me mad that we are so backwards as a society. Besides the fact that I need milk for my LO, expressing milk is also a health issue. I could never concentrate on work with engorged breasts. Or leaking. And I'm not giving up my nursing relationship, so there you have it it just frustrates me that there isn't more support. I work with pretty much all men so maybe some of them are mystified by it but it's a medical need for me and my baby. How else am I supposed to feed her?
But seriously, I get it. It's hard when that kind of thing is on your mind and you're trying to be professional and produce good work. Occasionally it crosses my mind that it comes across negatively but it is all in my head.