I haven't slept in two days. what would happen if i kept going without sleep?

Many things: Mental acuity and alertness would diminish, making driving risky. Your immune system will become depleted. Depression can become prominent. Cardiac stress will increase from being vertical for long periods.Vein distension in the lower extremities may become a problem. Many health disorders arise from lack of sleep.

Sleep deprivation: Sleep deprivation can ^ risk for fatigue, irritability, v concentration, diminished memory, ^ infection rate, ability to tolerate stressors, blurring of vision, v energy level, ^ micro-sleeps, weight gain, exacerbation of psychiatric problems and can even lead to psychosis.