I'm no Dr, but it seems very unlikely that the hydromorphone (aka Dilaudid) would cause pain. It seems more likely that you've developed a tolerance to it and that it's not offset with higher doses.

Dialaudid is a powerful drug. This drug is usually used long-term to treat pain associated with cancer.

I do hope you can find some relief. These opiates are so tricky - very effective (usually) at dulling pain but also very addictive - requiring higher and higher doses to achieve the same effect.

All the best to you and I hope you find an answer. Joe