Prolonged uncomfortable erections - not SRPE?

Hey Fellas, Has anyone experienced sudden Prolonged uncomfortable nocturnal erections?

Back story:

Years ago I had a bit of a injury to the Glans that caused some ED. Urologist organised the Doppler and couldn't see any issues. But...wouldn't check my glans and mentioned if there is an issue, nothing can be done in that area.

Fast forward to the past 12 months my nocturnal erections have been getting quite intense and feel like they won't subside unless I get up.. I went back to the Uro and they put me on baclofen therapy which helped initially, but the erections just keep coming back at night.

Now I'm at the stage where the erections seem to be flaring up the old injury to the glans, and can see some physical changes.

Uro suggested a sleep study, MRI on brain/spine (both came back clear), Pelvic floor physio, or to consider Testosterone blocker - which I'm reluctant to do for obvious reason.

I've sort of exhausted all my options but a pain specialist offered a nerve block to the L1.... to calm down the sympathetic response if the dorsal nerve is involved?

Anyone had a similar problem... have I injured the dorsal nerve? Or can PD cause this?

Cheers