Weird sounds and different reading

Sounds odd I know. First I have weird noises coming from under my right rib, pancreas is under there. I have 3 monitors and set them up all at the same time, been doing for about a week. There is amajor difference in all of them. Have called the manafactures, no help. They are all callebrated, used the testing materials, everything to make sure they are working right,. The tests performed on them say they are right but I get a variety of reading. This is an example, 112, 177, 211
another time 125, 159, 200. What is going on. I do wash my hands and watch what I eat. Do I give myself my shots when I keep reading around 100 on one meter? Help, I need some advice. The endo can’t get me in until 12/12. Thanks