Thanks for your query.
There may be two possibilities of your symptoms-
1) All are the symptoms may be because of pregnancy
but are you missed your period? You should consult a gynecologist for urine, blood test
and USG to rule out pregnancy.
2) These symptoms may be because of gastritis
or ulcer in the stomach also, in that case you should consult a doctor and take proper treatment.
3) Take plenty of water orally, take a balanced diet, don't eat spicy food.