Hi Nailit,
It really does sound more like a mood disorder to me. Symptoms like hallucinations are definitely more like a mental illness and usually require a psychiatrist and/or an intense psychotherapy.
Suicidal thoughts, addiction, and chronic depression can be overcome with some work on your part. I think maybe counselling or therapy might be more appropriate because it’s a much different environment compared with seeing a psychiatrist.
I suggest finding a therapist (start here:
http://www.findatherapist.com/ ) you can trust and who you feel comfortable opening up to and actually open up to them and give them a chance to help you. Rather than talk about the symptoms, talk about what’s bothering you. If not, I’d take up a hobby or develop a skill. Sometimes, we just need to find a way to channel our energy into something good.