Generally speaking, masturbation won't bring the missing period for you. The missing period commonly is caused by pregnancy and infection. If there is no pregnancy, I am afraid that the missed period might be caused by infection. As you may know that reproductive organs are easily to be infected if you are masturbating with tainted figures or sexual toys, I am afraid that you may have infection caused by your sexual toy or other things.
Since you provide zero symptoms, It is difficult for me make a diagnosis for you. I need to know more symptoms and more information. Please leave more details or contact me. You can contact me via online chat software from 9am to 5.30 pm Beijing time zone, and Monday to Saturday, emails: wuhandrlee@hotmail.com, herbalistlee@yahoo.com, skype: wuhandrlee@hotmail.com or yahoo messengers: herbalistlee@yahoo.com.