You can only die if over 40 or with heart problems
That is incorrect and pretty dangerous information to post - people can die from small amounts of cocaine and people can and do overdose on cocaine.
OP - if your used to taking cocaine and have a tolerance then it could be that your just overstimulated but if your feeling unwell you should seek medical help.
Typical Cocaine Overdose Symptoms
Cocaine abuse results in powerful stimulant effects. When taken in high doses, a person can lethally overstimulate their body and brain. This is known as a cocaine overdose. During an overdose, a cocaine user may experience the amplification of cocaine’s usual effects, such as increased heart rate and body temperature. Experiencing these extreme stimulant effects can lead to the failure of a number of organ systems and physiologic functions—causing the body or brain to shut down, and sometimes resulting in death.
Typical signs of a cocaine overdose include:
Dangerously high blood pressure.
Irregular heart rate.
Extremely high body temperature.
Extreme anxiety or confusion.
Psychosis.
Nausea.
Agitation or tremors.
Playing dare games and daring each other to take more and more drugs is a pretty ridiculous thing to do especially as your only risking your own health / life.