Can I push back the MOTN?

Hi everyone! I’m 10wpp currently and ya girl is struggling with that MOTN pump. My current schedule is 7am PP, 10am, 12pm, 2pm, 4pm, 7pm PP, 10pm, 3am. That 3am is rough, my LO is hit or miss on sleeping through the night but he does kind of wake up around 1:30 fuss but will fall back asleep with a binky until like 4:30am. I guess I’m asking can I start pushing back my MOTN pump so I can get more sleep. I’m an under supplier; my supply has been increasing over the past week but I’m hesitant in case it will drop my supply. TIA for any advice!!