Welcome, Benat! There are a lot of approaches to try, but what has worked for me is AVRT. Google it, I can't link it here. The 'crash course' will only take you twenty minutes and it's free. To be honest, it's all I've needed...and I just celebrated 1 year sober yesterday. If it doesn't work you're out nothing but a few minutes of your time.
Good luck on your quest!