Hi,
Headache has many causes but as you mentioned your complaints so first of all you should get your blood pressure checked and maintain proper hydration. If you are having chest pain then you should visit your nearby physician so that he can examine you and get your ecg done. For tooth related problem you must visit dentist.
Next Steps
Get your self examined by physician.
Health Tips
Gas problems mainly occurs due to improper food habits and digestion problems. Have you meals on time add lots of Fibre foods in you diet like leafy vegetables, fruits, legumes. Drink daily 2-3 liters of water.