Prostate pain after sessions

I’ve had my helix for a couple of years. All was well for the first year but then I started getting a dull pain in my prostate after using it. Not immediately after but if I sit down for a few hours or take a dump then I get a dull ache that lasts for a day or more.

I now limit the times I use it to once every couple of months and limit the sessions to one hour. Nonetheless I still get the pain. I’m thinking about quitting altogether as I’m worried about long term damage. Anyone else get this? Any possible solutions?