Attempted suicide

So about 6 months ago I tried to commit suicide I slit my wrist but I survived and was "lucky" I hate that word because my life's just more shit at dinner my family always make weird looks at me and at school whenever I have pe I sit out but still have to where my pe kit and lost my long sleeved shirt recently so I have to where short sleeve and I always where a bandage around my wrists all the time and unfortunately one of my teachers didnt get the memo on the fact I could wear them and she told me to take them off because I don't back chat I took them of and it felt like everyone was judging me my friends aren't much better one friend had the guts to explain to me on why what I did was bad I know that and it just makes me feel more shit. Can anyone help. out.