I was reading about how not chewing your food causes poor digestion. could bad breath happen because of it?

Bad breath: Salivary stones, gum disease, tooth decay, and esophageal reflux are some of the common causes of bad breath. Chew your food more, but this is probably not the cause. You'll know pretty quickly.

Usually a cause: There is usually a cause for bad breath. Proper oral hygiene and healthy dentition and gums is the most important. But meds, supplements, poor nutrition and leaking fillings and/or crowns (caps, ) can be sources. Get a thorough checkup. Brushing your tongue does help. You do not want to overuse breath mints, etc., because the sucking on the mints can cause problems over time.