Long stretches at night

Recently my almost 3m daughter started sleeping from 8pm-3am. Before this, she would feed every 3-4 hrs at night. While I'm grateful for my new found sleep, I'm worried about my supply. Should I be getting up and pumping once since she's going so long? During the day her stretches are going longer as well...anywhere from 3hrs to 5hrs. I return to work on Monday, so I'm sure she'll be eating more frequently at daycare. I'm nervous my supply will drop already bc I won't be around her during the day, so these long stretches at night (happily) worry me.