Cheecho,
Hi - your story sounds similar to mine, except that I started with the Limerick. I developed horrible plugged ducts. I found out that I was not using it correctly. You have to have the "cycle" knob turned all the way on. Then, adjust the "vacuum" knob as far as you can go and still be comfortable. This should work much better for you. I used an Ameda to clear the ducts as well. The Limerick works better if you use it correctly. Getting two pumps is quite expensive... hopefully this helps.
Punky