Am I doing this all wrong?? My avent pump...was brilliant but but it broke and have been gutted so, as a cheaper option I got a mimi Medela pump. It just doesn't work for me though. The vaccum is strong but the pumping action isn't fast enough and my breast wont react to it. Am I doing this wrong. I always used the avent on quite a high speed. Have resorted to using the avent nauelly instead but since I express three times a day this is really getting me down. Am i using the medela wrong? ......