Welcome to the forum. The symptoms that you have can be because of gastritis
. It usually presents with burning pain in the area around the umbilicus
) and moves up to your esophagus
causing you discomfort. The pain may move around in your stomach area. To keep fit you need to maintain your diet ( less oily, less spicy, avoid junk and fast food ) as well as time when you eat. Antacids can be of help to you.
Since you have headache and head feels hot, you should consult a doctor to rule out viral fever
. You may need to have some investigations ( routine blood and urine - routine/culture sensitivity ) antibiotics and analgesics. Drink plenty of water, soups, juice and do not hold urine for long.
You have not mentioned about your sex life, if you are a sexually active person and have sex without protection, you should note when you had your last LMP ( last menstrual period ). Get a urine test done to rule out pregnancy. Visit a gynecologist if you have missed period.
Have a nice day, take care.