My advice would be to give it some time. A fistula takes time to develop but you will be much better off to lose the catheter if at all possible.Try a cushion under your arm. Is the machine alarming at any movement of your arm? Where is your fistula, forearm or upper arm?BTW - all stickers are not created equal.
Good nurse. If you aren't alarming you may not have to keep that arm perfectly still. The alarm will tell you when you moved too much and you can figure out the range of movement you can get away with.
regular nurse