Hello and thank you for your question.
Is the headache one sided?
no both sides over ears back toward front
do you have any medical condition?
when did you take aspirin?
after the removal of my gallbladder I have had gastritis and now I take 40 m pepsid every morning to control acidity
okay. Probably the pressure headache is due to the acidity.
If you took aspirin in the morning than you can take Aleve or Advil but make sure you take this if aspirin was taken before 6-8 hours.
well when I have acidity I can feel it but I have not had the symptoms when the nausea and headache start
certainly the nausea and headache is related to your stomach.
so what is next?
you need to take Advil or Aleve to ease the headache and try zantac with it.