Advice for pumping

Hi ladies! I have a quick question. So every time I pump every 2 hours I get only 2-2.5oz but when I miss an hour or 2 hours I pump and get like 3-4oz. Should I pump every 3 or 4 hours to get more milk? Would pumping every 3-4 hours decrease my supply? Or should I pump every 2 hours? It's hard for me to pump every 2 hours becuz of my daughter  she would stay up for hours wanting to drink directly from bottle not my breasts so I'm always late to pump on my schedule.