Welcome, Ozfrog44!

So sorry you've had these symptoms. They might have no connection to the vaccine but then again they might.

You should definitely look into the drugs you've been taking and give special attention to the dosage and possible interactions with other drugs. For instance, the Targin you mention has quite a few possible adverse effects and interactions:

Targin Advanced Patient Information - Drugs.com

Endep can cause problems too:

Endep Side Effects: Common, Severe, Long Term - Drugs.com

Any drug (or vaccine) can cause problems but some drugs need more careful watching than others. Hope you'll find some helpful answers soon!