I had problems with the pump a few but being male i have not had any the way you are. Sometimes you may hit a part of the body that you used to in inject which can block the insulin flow, you may have a faulty batch of cambers where they keep getting stuck, or your machine may have a fault on it. Have you tried different different needles as you can have ones that fire in or ones that you put in yourself. My problem was in bed moving around or if its really hot the sweat on my legs would make the infusion come away from the body so i had to buy some medical tape to keep it in place. I do know that if you are on a medtronic pump you can phone them up and if they can not sort it out over the phone they will send you a pump out and you can send yours to be fixed, they also will give you a back up pump if you are going on holiday as long as you give them about 6-8 weeks notice.