Going back to work breastfeeding

I go back to work this weekend doing 12 hour shifts. Baby has been EBF since she was born getting a bottle or two a day of pumped milk if I’m in the middle of something and can’t sit down to feed her. I’m just worried she is going to have boobie withdrawals when I return back and have a hard time taking that many bottles with no boob all day. Some times the boob is the only thing I can get to comfort her when she’s fussy. She will be 6 weeks. I guess I’m just very stressed