Hi and welcome to XXXXXXX Thank you for your querry.
This sounds to me like stomach issue which is very common at your age.This isnt something serious and usually is easily treatable. Any type of gastritis, GERD or hiatus hernia cause such difficulties. Reason for this is high secretion of acid which then irritates your stomach esophagus and bowels. It leads to heartburn, bloating, abdominal discomfort,nausea, breathing difficulties, tiredness and chest burning pain. These symtpoms are aggravated by food, especially some food. Sometimes acid is regurgitated (it comes back) into your throat and mouth during the sleep and then it causes toothache and throat pain.
I recommend 2 things. First is changing you dietaryand lifestyle habbits. Eat 5-6 times per day but slow and small meals. You should avoid alcohol, smoking,coffee,carbonated drinks fats,spicy and fast food and eat more milk products,boiled meat, sweet fruit,vegetables and nonsaturated fats. Also try not to lay down or sit for 1 hour after meal. Leaning forward also makes symptoms worse. Sleep with elevated upper body and do often exercise if you are overweight.
The second thing are medicines and diagnostic tests.There are many antiacid medicines which you should take after having gastroscopy. This procedure will find the exact cause and see is there any sign of hiatus hernia and Helicobacter pylori. So if these home remedies wont be helpful, consult your gastroenterologis about performing gastroscopy which might be unpleasant,but it is necessary.
Hope I have answered your query. If you have any further questions I will be happy to help

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