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Please mention your age. The tinge felt is befor or after food? or empty stomach? And when and how does the headache appear?Dizziness
can be due to hypoglycemia
or even high blood pressure
. Have you checked you blood sugar?
Gastric discomfort and headache can be due to Acid Peptic Disease
. Which is typically worse due to stress, loss of sleep, too heavy meals, fasting, smoking, alcohol , certain drugs like anti-hypertensives, pain killers, or sometimes lying down soon after meal etc. Treatment is dietary modifications and antacids. Or you may try homoeopathy for that.
Please see a physician and get yourself examined to rule out cardiac problem, diabetes
or any other illness.