Thanks for writing your query.
After reading your post, it seems that your symptoms can be due to gastritis
and the air of the fan has no role in increasing the symptoms.
You should get yourself clinically examined and investigated.
of abdomen and an endoscopy
will be helpful.
Following precautions will be helpful :-
1.Avoid spicy and oily foods.
2.Avoid being empty stomach for long periods.
3.Avoid mental and emotional stress.
4.Avoid smoking and alcohol, if any.
5.Avoid self medications, especially pain killers and steroids.
6.Drink lots of water daily.
7.Eat light meals prepared under hygienic conditions.
You can take an antacid like Omeprazole
40mg once a day before meals along with Domperidone
30mg for relief from your symptoms.
I hope this is helpful to you.