Thanks for writing to health care magic.
The exact cause of that pain on one side of the face should be identified first. It could be one among various possibilities (Like trigeminal neuralgia
). A physical examination along with investigations will help in identification of diagnosis. The cause of nausea
sensation could be the analgesics you are on. They could be causing gastritis
and could be responsible for the stomach pain. Your doctor may prescribe antacids after physical examination. Those dizzy spells require examination and investigation to further comment on.
Continue to ask further queries as required.
Hope this helps.