I woke up with a swollen finger this morning, its never happened to me before. the previous night i had been consuming alcohol and taking cocaine?

Go see your GP: It's never a good idea to consume cocaine (stimulant) and definitely not in combination w/alcohol (depressant) as your body won't know whether it's coming or going. As a result, there's a good chance you injured yourself w/o being aware of doing so until both chemicals wore off. Bottom line, don't do it again. And go see your GP to r/o fracture, dislocation, infection, etc.

Probably trauma: related. While under the influence of alcohol and/or cocaine, a person could easily sustain an injury without being aware of the injury at the time. There is an old joke, that you can always tell if you had a good time the previous night if your fingers are sore in the morning (this is from people stepping on your fingers while you were passed out on the floor). Be careful!