You were probably using Option Numpad 7. The quantity of items that you used/consumed will never decrease but they will also never increase when you pick up or loot them unless you disable it. If you don't mind having a maximum item quantity of 999 in your inventory, then you should use Option Numpad 3. All items that you pick up that are usable/consumable will set to its maximum quantity. The only drawback of this option at least for me, is that you can make your character stronger during the early part of the game which kinda puts you to a certain advantage. That is still for you to decide if you want to do it though. Me, I'd prefer to obtain them normally as the game progresses which brings me to my previous post about the Option Numpad 7.
You may have had accidentally used Option Subtract (Reset Items/Skill points quantity to 1). You can either continue playing and get those items again or you can start a new game if you don't have a backup save file.
Please use the trainer option request system for requesting new options be added to this trainer and/or vote on options already requested.
While waiting for an update to be released, you can use our free CoSMOS Gamehacking Tool to easily hack the game yourself. We have tons of video tutorials available for even those with no prior experience with memory scanners or gamehacking tools.
I believe that's called a saved game...