My 10 year old daughter has had T1D for a little over a year now. We just got a Tandem t-Slim about 3 weeks ago and it has caused many headaches. She will get to a point where is just does not seem like the pump is working at all. (We are changing her site every 2 days) Her numbers just keep climbing. The Endo said that it might be bad insulin or a bad site so each time, I change the site and have changed the insulin as well. She will be good for about a day and then her numbers climb. I put on a new site yesterday and already tonight, her numbers started climbing and the insulin didn’t seem to have any effect. Does the body ever just reject the use of a pump? The doctor ordered a sample of the angled insertion and also a stainless steel site today. Has anyone ever dealt with this? I am very weary of my daughter feeling so awful.