Is my daughter mad at me or something?

I have a beautiful 9 month old girl and she is the love of my life. Here's the problem: I work full time, 3rd shift, so when I get home at around 6:45am I take a shower and go to bed until around 2pm, then I have to take a nap from 7 to 9 so I can make it through the night, which doesn't give me a whole lot of time to spend with her. My mom watches her at night and while I'm sleeping, and if I wake up to use the bathroom or whatever I can hear my mom making my daughter laugh so hard, but if I go and do the same thing (for example, peek-a-boo) she doesn't laugh at all. Do you think she's mad at me for not spending enough time with her? I used to work part time, so I had a ton of extra time to spend with her. I know she still loves me, but it kinda hurts my feelings when I can't get her to laugh like my mom can. Am I just being too sensitive or what? I hate that I have to work full time (5 days a week) but we need the income so I can't go back to part time. What should I do? She's been gone all day today with my mom and I miss her so much!