My pump in style advanced was great when I got it a month ago but now the suction seems weak and I don't get much milk out. I think it's effecting my supply. I can pump for 30 min and get 1oz -1.5oz then turn around and hand express for 30min and get 3oz. I used to get 6-9oz in the beginning with the pump. I can feel lent left in my breast after pumping. I can turn the pump up and it will start to hurt but still I don't get the milk out. I have checked everything that can effect suction. Does it sound like a faulty pump?