Its so hard to believe you have bad breath when even you cant smell it, right? :)
Yes it is. And its because of our body's adaptation of senses to environment. You know how when you spend a lot of time in a smelly room you dont find the smell offensive (or that offensive) anymore, then you step out on fresh air for 5 minutes and come back and BAAAM you wonder how you could stay that long in that smelly room?
Here is a trick that keeps me sane. Lick your wrist with one big long lick. After 15-20 seconds smell the wrist. You WILL smell something trust me! It doesnt have to be extremely bad but you will smell something - bad breath = smelly saliva = smelly pillows.
On days when i know my breath is relatively ok - after licking wrist i dont smell anything! Its so true. Now that doesnt mean the bad breath is completely gone but when you compare that to chapter before at least makes me confident im not insane.