Yes, Alisha I had a similar experience. I was obsessing too and even imagining that I was not feeling well because the thing broke. So they called in Cipro for me and when I went in to do PFT's my numbers were higher than ever. At one point, I had my husband hide it from me. It was getting ridiculous. I don't think they are very accurate. I think they may be a good tool if you can be reasonable about it and not jump to conclusions when the thing malfunctions. That is really hard to do though because, how do you know if it is the machine or not??