OMP Bad Behaviour

#include <iostream>
#include "Windows.h"

using namespace std;

int main(){
    int x = 0;
    for (int i=0; i<100000; i++){ //pretend main loop
#pragma omp parallel for schedule(dynamic,50) reduction(+ : x)
        for (int p=0; p<10000; p++){
            x++;
        }
        cout << "X = " << x << "\nNow sleeping for 50ms.\n";
        Sleep(50);
    }
};