K.
You should get the suction on your pump checked it sounds like - there could be a leak in the air hose or as the other poster mentioned it could be low on batteries if you're running on batteries. The other thing about pumping is that it does, as you mention, require the right mind set. I think of it sort of like masturbation - you need to be "in the mood" for it to work ie to get a good letdown. If you don't get a good letdown you can pump and pump and you still won't get much at all. I have a few other posts where I mention what worked for me to achieve this. so I won't repeat here. Also make sure you're well hydrated and eat plenty.