You just described the smell of ketosis to the letter, Kodi. What you are smelling are the remains of burned ketone bodies that spill over into your urine and into your lungs. If the smell is very strong it's a sign you're not drinking enough water The reason you may not be experiencing it as much in the evening is that you drink your water as the day progresses, thereby diluting the concentration.

Many people experience ketosis after fasting, i.e., when they wake up in the morning after a good long sleep.

Nat