for newborn baby that is having difficulty to latch, can I start pumping 5x a time (power pump 2x/day) and slowly increase?

Still feeling tired/dizzy after each pump session and sometimes don't get any yield in a pump session. I've only done it a few days after coming back from hospital and 4-5x per day as I tend to oversleep during naps or miss schedules. I find it hard to do 8x per day. Any suggestions?