Bryanna is the best for dental issues, but I wanted to say hello and welcome.
This is my opinion and I am in no way a professional. If you have seen your dentist and your teeth and GUMS, tongue, are OK, you need to see your primary doctor. Sometimes medical conditions first present with a change in breath. I would get this appt. as soon as you can. You probably already know in the mouth, bacteria is what causes the bad breath. Get the two small holes fixed while they aren't much of an issue. Seems to me your dental practices are very good. ginnie