Excellerated heart rate hand tremors, constant myoclonic jerks preventing getting to sleep. Cocaine, coffee?

So the night before last I was stupid and did some cocaine. I will never do it again. I was also drinking a lot of beer. The next day I was terribly congested. I had bad sinus pain. I used some over the counter decongestant nasal spray and took a non drowsy decongestant. I started drinking beer that afternoon. Later that night I got a call that my best friend had tried to kill himself. I went to the hospital and drank a cappaccino and maybe two or three coffees. I stayed the night at the hospital with my friend, I didn't really sleep at all. I got home at around 10 this morning. I tried to go to sleep but I kept having "myoclonic jerks" everytime I would almost be asleep, again and again. I then began to sweat and my heart rate went crazy. Hard and fast, skipping beats agony! Finally I calmed down and after a while my heart rate went back to almost normal. I went to work and I just got home about an hour ago hoping to sleep but I can't fall asleep because everytime I'm almost asleep my arm, or hand, or leg will do the twitch/jerk. Was my heart rate messed up this morning because I was having an anxiety/adrenalin attack because my best friend almost died? Because I had been up so long? Could the two lines of coke I did 24/36 hours earlier were affecting me still? Could it have been some type of late reaction to the coc, the beer, the decongestants, the caffeine, the lack of sleep, and the near loss of my friend? I feel fine now, except my hand trembles a little. But I still can't get to sleep. I expirience myclonic jerks a few times a week but never over and over again just minutes apart (very subtle ones though) When you answer please remember, all of this sounds like a lot but the cocaine was done prob 48 hours ago. Im really scared. When you answer please try not to scare me :)