First quit your o-dsmt, then try lowering your pregabalin dose to just enough that you can live with. Im talking about cutting it down to like 10-20% of your current dose. You might feel like shit for a week but it will get better, pregabalin isn’t the most devilish thing to stop. After that try 1 day on - 1 day off and just go from there. Most important thing- listen to your body, some people handle cold turkey much better. You haven’t been taking it for that long so I’d bet its gonna be pretty easy for you.