I have a spine injury. I had deep tissue massage 3 days ago and have been heavily nauseated since with increased GERD symtpoms. Is this normal?

Possible as GERD can. Be related to stress as with an injury and with certain prolonged postures as with a deep tissue massage if you were face down and flat on a table reflux would be more apparent. This also may be related to medication such nsaids if using them for your injury as well. Speak to your doctor about these symptoms.
No not normal. And this may or may not be related to the massage or spine surgery. However it should be reported to your internist and spine surgeon. Medications such as oral narcotic analgesics in combination with nsaids may increase the potential for exacerbation of gerd symptoms.