Am I Depressed?

My mum died about a year ago.

I'm a 16 year old girl and feeling awful. I've been having bad mood swings, one minute I'm happy, then something irritates me and I can become sad or even angry. I have had suicidal thoughts and have cut my arm to try and relieve the pain. I have felt that each day seems to drag and school has become boring. When I used to love School I now hate it.

My thoughts are mixed up and I don't know what to think. I feel worthless and hopeless. I don't know what to do anymore. My emotions take over me sometimes and sometimes recently I feel like I can't control them.
I'm worried that I will hurt someone I love emotionally as I tend to snap when I am in these bad moods.

I tend to isolate myself a lot and I have stopped telling people how I feel so that I have no risk of being hurt. I fell so alone and no one seems to understand how I feel. I have been told it could be my hormones, but I'm not sure. I took a depression test online, although it may not be reliable, it said I could have severe depression.

I just cant stand it anymore and I want out. Do you know if any of this means depression or is it my hormones???

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