hello and thank you for asking HCM,
I understand your concern since it is affecting your daily life. My suggestion is to visit your GP to make a proper examination because there could be a lot of reasons of such kind of headache. Since you are feeling sick, you may have an inflammation. The inflammation could be localized in your sinuses
or your mouth (teeth, gums) or somewhere else in the body. So visit your GP to make a proper examination of your condition.
You could also have problems with your spine, which could also lead to headaches
Until than try to use analgetics.