If you want to know how your breath smells, try this simple trick.
Stick your tongue out as far as you can, and with the back of your tongue, lick the inside of your forearm - about two or three inches, not the wrist in case you have perfume which will distort the result.
Let your saliva dry, and then sniff the space - whatever odour you get is what your breath smells like at that time - hopefully it won't smell at all, or maybe a little, but if you find your legs wobbling, and everything going black, then you need to get your mouth sorted out a.s.a.p.