Hello 
Since , you are just 18 years and having 
acid reflux for 2 years with so many diseases in your family .
These measures  may be useful for you .
Try raising the head of your bed about 4 inches with blocks . It might also help to avoid eating or drinking for 2-3 hours before you lie down . To help control stomach acid one should not drink alcohol or drinks with caffeine in them or eat chocolates , pizza, burgers or spicy or greasy foods . Also take some 
antacid but if you thinks that there is severe acid reflux you may need drugs like 
proton pump inhibitors like pantoprazole-d once or twice in day .
You can also take rabeprazole+ 
itopride one tablet two times in day  till complete cure.
This is a prescription medicine ,so consult a physician and get his prescription.
2nd reason of such acid reflux is usually over eating , so take care about .
3rd reason , as I have noted in my so many patient is tension or 
anxiety , so be careful.
Hope these things will be useful for you.