I am 14 and female, and I usually laugh a lot and yesterday I went to Morrisons which is across the road from my school, and got the sudden urge to walk away, I wanted to commit suicde. There is way more to this and I don't want to share but I'm just confused why I was a laughing and loud person yesterday and now I'm completely quiet and I feel so alone and miserable the day after the urge incident. What do you guys think it is? Today a teacher came to me and asked what's the matter with me and I told her to f*ck off and I feel so bad about that now and I have feeling the urge to self harm which i drew on my hands to prevent, why have I changed in such a small time space I know you won't be able to answer but what would you think if you were a teacher and a very happy/loud/laughing/Extroverted student suddenly became the opposite, thanks