Last night, i used a good amount of cocaine. I also drank a lot of alcohol, and smoed "hash oil" or concentrated THC. i probably did about 4 "lines" of cocaine total (not sure exactly how much each line consisted of), over a period of 4 hours. after i smoked the hash oil, i started feeling extremely dizzy, nauseated, heavy breathing, and vomiting what im pretty sure was blood. at first i vomited normal yellowish collored vomit, then i began wretching hard, and eventually it was just saliva and blood, or at least thats what it looked like. i really thought i was going to die, and i have no idea why i didnt find a way to get to the hospital immediately. i left the room so none of my friends know about me vomiting blood. either way i soon fell asleep, and woke up this morning and walked back to my dorm. I feel fine now, and its been about 18 hours. i havent had any substance today and dont plan to in the near future, if so, it would only be alcohol and in smaller amounts. no drugs again. i just wanted to know what could have possibly happened to me, and what should i do, because im currently sober and feel fine, my throat pretty soar though thats about it.