Going through a rough time, what do you recommend me doing?

I just got my grades today for my 1st Pre-IB semester and I did very bad. I got -3 in Biology and thats the lowest grade on the scale. And adding to that this teacher hates me, I am guessing maybe he’s a racists because all the other white kids got good grades except for me…
adding to that he also sent me a message saying “Your grade record shows that you do not live up to the standards of this programme and that it will not be possible for you to be transferred to the IB Diploma Programme”

I have never cut myself before but now since people say it relieves the pain I really feel like doing it, but am scared :(
I am crying as am doing this and I have been doing it for about 2 hours now…. and its causing me to have a headache.
At the moment I don’t ever want to see this teacher!!
Fuck him!