<human>: Hello Reddit. I've recently met a girl through my friends who last week tried to kill herself. I knew about this, and on Thursday met her through my friend and hung out with her with others. We sort of hit it off, she seemed like such a nice and genuine person. So basically we've been hanging out for a few days, and I thought everything was fine. I thought I was being a decent person helping her out, keeping her busy and happy (as we've been having a great time getting to know each other). Tonight, we went out, and she has come back to mine. Suddenly out of nowhere she is off her face falling around. She admits to me she has done coke for the first time earlier on. She's also been drinking a lot of alcohol (I know drinking alcohol right now is definitely a bad idea.. but I can't be telling her these things). 

She is now on the floor of my bathroom in severe pain. Seems like a bit of paranoia, and severe headaches. 

I am comforting her, but have been asked to leave for 10 minutes while she throws up (I think). 

Is this normal? Should I call an ambulance or something or is this just a normal 'come down'. 

I'm really quite worried, purely through inexperience at this.

Can you summarize the given text in a few sentences?
<bot>: My friend has taken coke and alcohol and has severe headaches, throwing up and is really freaked out. Should I be overly concerned or is it a normal come down?