I mixed, a half of xanax, (alprazolam) nyquil, and alcohol. will i be okay?

Doses matter: Doses matter. Small amounts, you should be fine. But large enough doses can kill you. You need to be honest and give exact amounts here if you want your question to be answered better. Bigger question, why did you do this? Were you trying to hurt yourself? By asking the question, you know this was not a good idea. This issue needs to be explored with a professional.