If things are very hard right now
There are states you should not stay alone with: when it hits so hard you can't breathe, when violence has happened, when you can't stop drinking, or when you fear for your own life. Help exists, it is close, and much of it is free and anonymous. This page collects places you can turn to right now, wherever in Europe you live.
You don't need a «serious enough» reason to call. Feeling bad is already a reason. They will listen, help you get through the acute moment and tell you where to go next. In Germany, TelefonSeelsorge also offers chat and email counselling; the directories above cover the rest of Europe, in local languages and English.
Domestic, physical, sexualized - any kind. It is not something to «endure», and it is not your fault. In Germany, the Hilfetelefon «Gewalt gegen Frauen» (116 016, 24/7, free) counsels in 18 languages including English and Russian, and will point you to the nearest crisis center. Similar lines exist across the EU - search «domestic violence helpline» plus your country. These services help legally, psychologically and sometimes with temporary shelter, free and confidentially.
There are communities that have been helping people climb out for decades: Alcoholics Anonymous, Narcotics Anonymous, and for those who grew up next to addiction - ACA (Adult Children of Alcoholics). It really works. Meetings are free and anonymous, in person and online, in many languages. Search «AA / NA / ACA» plus your city - meeting schedules are open. You can come just to listen: nobody will make you speak.
Severe depression, panic attacks, intrusive thoughts of death, states where reality «floats» - these are treatable, and the one who treats them is a psychiatrist. Seeing a psychiatrist is ordinary care for your health, like seeing a cardiologist.
If confidentiality worries you: private clinics and psychiatrists in private practice see patients confidentially. It costs money, but it removes the main fear that keeps people from reaching help.
Honestly: I am a psychologist, not a doctor. I don't prescribe medication, don't work with severe psychiatric conditions and don't work with children. But over the years of practice I have built a wide network of colleagues - psychiatrists and psychotherapists I trust.
If you don't know where to go with your situation - write to me. I will help you get oriented and recommend a specialist. It is free and comes with no obligations.