While bad or poor oral
hygiene can affect teeth, since you have cough, it is possible that you have a bad gastric reflux. Take Omeprazole empty stomach in morning and an antacid gel at bedtime. Refrain from smoking, alcohol, fuzzy drinks, caffeine, and spicy food
Excessive fatigue can also be due to menopause/hormonal imbalance of PCOD, anemia, diabetes, hypothyroidism, or due to kidney or liver problems.