Need encouragement while exclusively pumping!

Hey ladies, I am exclusively pumping since my third child has not been able to latch on. She is now 3 weeks and I’ve already got an infection which is extremely painful!! I don’t want to stop giving her my milk but it is painful and very time consuming to pump every 3 hours. If you have any tips that would help me please share! How long did you EP for? How did you keep at it? I am taking “Cows Cash” and it def helps my milk supply. I’m just exhausted trying to keep up with her feeding needs. I started out thinking I would do this for 6 months, now I would be happy if I got to 3!