Well, stimulants can cause severe anxiety which can be pretty scary, but it doesn't seem like you were experiencing a panic attack or something along those lines (I just didn't get that impression from reading your post but I could be wrong).
Some cuts may cause issues but cocaine itself is a pretty cardiotoxic drug, it's notorious for causing cardiovascular complications.
Symptoms like chest tightness accompanied by trouble breathing and other cardiovascular effects following cocaine use (specially binging) shoud be taken seriously.
Out of curiosity, are you a cigarette smoker?
For instance, the risk of heart attack is thought to be about 20-25x higher within the first hour of taking cocaine.
IIRC it's one of the main causes of myocardial infarction and other serious heart problems amoung young people.
So yeah take care and please seek help if you start feeling sick again.