Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You had sinus
problem for one month. You must be using drugs continuously to get relief from it. At last you got relief with decongestants, but i would like to know whether you have used medicines by a doctors priscription or over the counter drugs.
After using the drugs for more than a month one can get gastric hyperacidity
symptoms like pain in the upper abdomen.
Some people may get such pain with out using the drugs also, depending upon the diet etc.
I advise you to consult a gastro enterologist for diagnosis and treatment. You may need to have gastroscopy for confermation of the disease, besides other routine tests
Avoid taking spices, junk foods, and oily foods to avoid gastric irritation. You can ask any doubts if you feel to ask.
Wishing for a quick recovery.