Teenager. Suicidal Tendencies. Cut Left Wrist Deep, Dizziness, Bleeding. Help

so im 15 and i cut because im depressed i am a female. i've cut my left wrist downwards deep and its not a long cut its long enough to bleed alot. anyways i cut 4 days ago and on Sunday night i removed the dried up blood clot on the wound and it just build up blood really fast. i've had to wipe it up a few times quickly because it was getting on the floor. i didnt want my parents to see it so im covering my tracks.... later on the night it kept bleeding and i got tierd of letting run out. so i laid down and laid a heavy paper towel (few) and i went to sleep letting it drip on the paper towel. i woke up really early and was dizzy so i just laid back down. but the next day i woke up my entire pillow, matress,covers, even my teddy bear had alot of blood on it. and even on the day i cutted that deep wound i lost alot of blood.. i dont understand why im still here, i am suicidal i really dont care i have too much going on im just tierd. anywho, could someone tell me what will happen if i dont get medical care this wound is dried right now because somthing in my skin is holding the blood back so if it removes more blood will spill. what should i do?.