Ok y’all I need some advice

I’ll be going back to work next month when little buddy is 4 months. I used to manage 12 hours a day, 5 days a week. When I return I’ll be serving instead of managing. 6 hour shifts. I’ll only work every other Saturday and Sunday. If I work for 6 hours do I pump every two hours at work? Would I pump 3 times then? Right now I only pump once a day in the evenings at night. I have over 75 bags of milk stored already. My parents have maybe half of that for when they watch him. Will working every other weekend drop my supply? Thank you 😊