Best way to quick start your period?

Aaron • 23 years old. Married my best friend in October 2015! Not TTC until after I finish schools
Hello girls, quick question for you guys. I have been feeling period pain for a few days now, without the actual period coming. The pain is constant and I wanted to know if any of you guys had any tips on how to quick start your period. There is no way I am pregnant (my SO and I haven't been intimate in over a year because we are long distance). So let me know guys! Thanks!!