Feeling guilty - working mom

Am

I have to work, staying at home is not an option. My mom watches my daughter from 8am until 7pm Monday through Friday. I feel guilty that I really only get to spend an 30 minutes with her in the morning after she wakes up. During that time I'm also trying to get ready to leave. When I get home I only spend another 30 minutes with her before I try to put her down for the night. Everyday I feel like I only get to see her for an hour and nurse her for only a few minutes a day. I'm worried she's not getting enough mom time but there isn't much I can do. I spend my entire weekend with her. Anyone else struggling wit this?