Exhausted from pumping

Hi mummies I'm a ftm at 22.. and I'm exclusively pumping bc i couldnt get the hang of latching my LO on and i was getting frustrated so i opted for bottle feeding n pumping. I'm getting very tired from the pumping!! and because of being so tired i do miss my pumping time and end up with engorgement... which rly hurts!!!!! and now i find myself having to pump every 1.5h - 2h which leaves me with little to no sleep/rest... any advice from mummies? also any idea how to slow down my milk production?? and stop engorgement??