Feeding Advice

My little girl will be 9 months when I go back to work part time in two weeks. (I will be working 5 hour shifts a few times a week). Her current eating pattern is to nurse and an hour to an hour and a half later she has either a snack or a little meal (solids). Now my question is, would you recommend to pump (I absolutely hate pumping more than anything and I never get much out when I do) and give her breast milk while I’m at work or at this point is it okay to just supplement with formula for one feeding when I’m gone? The thought of pumping really stresses me out but I also feel like I’m being selfish for not doing it. But I plan on weaning her at a year so she only has about 3 months left of nursing anyway so what’s wrong with supplementing one feeding? Ugh, idk guys. Any recommendations?