Thank you for the query.
Stomach issues seems to be the most probable reason of your symptoms. It can be acid reflux
disease (GERD), peptic ulcer
, stomach inflammation
or Helicobacter Pylori infection
can also stimulate stomach acid secretion and trigger your symptoms.
Zantec should be taken regularly, in the morning, before a meal to be effective. Moreover, if the Helicobacter Pylori infection is present, without antibiotics treatment you wont get any relief.
I suggest you to visit your doctor and have gastroscopy done. This test is necessary to rule out peptic ulcers, cancer and Helicbacter Pylori infection.
In a meanwhile please avoid coffee (this is very important), fatty foods, spicy foods, fruit juices, alcohol. Do not eat before sleeping (last meal should be 2 hours before sleeping). Put your head a little bit higher when sleeping.
Hope this will help.