Don't feel so bad about this. Just be glad you caught it now. Much better than when it was really needed.

We have ran into the same thing ourselves, still do to some degree. My problem is lack of storage space for everything. I have our food pretty consolidated and list of what is in each storage box with weights, dates, & quantities. But a lot of our other preps are scattered about the house, basement, & garage. Inventory on that stuff is not near as good. I am still working on settling on a good system for tracking everything, including where the stuff is.