Today I felt alright but now I feel sh*%

Im not going to lie. I have just had a MAJOR urge to slash myself. Pick up a razor blade and cut my arm. I haven't in a while and Im not even sure why I want to now. I need to learn not to let things affect me so deeply. I need to learn to fulfill my own needs so everybody else (or maybe just you) aren't so damned unreliable and bloody frustrating to have in my life! !uuuuuuuuuuurrrhrhhrhhghgggggghhhhhhh