pumping question

Kristy
In the beginning of my breastfeeding journey I could pump out 4-6 ounces extra easy! I stopped pumping because I didn't feel the need to save milk. Now I want to get my freezer supply up for baby sitters but I am struggling even getting 2 ounces out :( I've been trying the past week and it hasn't gotten any better. Any advice or experience in this type of problem?