Jeez,
Unless you have done a shitload at once, and got "geeked" out, then those symptoms aren't from the coke. WHen you do too much, it shocks your body and that's why you get those.
However, if you are getting symptoms like that without doing extraordinary amounts, then it's because of your body's reaction to the drug. You've probalby done coke so many times that you body just pays attention to the negatives of the drug. Your cocaine usage is out of the "honeymoon" phase where it's the most wonderful thing in the world, it's back in the real world now. Trust me, i've been there done that.
When I started, i didn't have good hookups, and cocaine was the most sexually exhilirating, sociable, stimulant ever. But through my prolonged use, the negative side effects are more pronounced. This I know for sure, because I have WAY WAY better coke hookups - it's not powder anymore, it's a really pearlescent chunk. Yes, yes - I know about rerocking.
Case in point - my buddy who has done it maybe 4 times, gets all chatty and cocky and is always moving around when we both do it together, but i get the more pronounced negative effects. Same batch, different effects due to overuse. I've been where he is now, and believe me I wish I could still get like that. Still get euphoria, just doesn't last as long as it used to, and dont' get stimulant social qualities that i miss.
THERE IS NO MYSTERY CUT. Plain and simple