So my flex spending account approved the product the first appointment and the second time I went to get product, they are trying to deny it. Anyone use flex spending successfully? If you haven't, how do you budget for this program with other bills. Sometimes I wouldn't spend but $90/week for my family of 3 for groceries. I don't want to stop the program but I don't have extra funds if flex spending won't cover me. I provided a letter from my doctor saying it's medical with detailed invoices on the first go around and did the same this go around and they said invalid receipt.