Hi Yvette,
At least you know you are not pregant lol.
It sounds like you could be on the start of the menopause, my periods went away for a few months t , then i had a few more and then they stopped again and were on and off for a few months and then for two years runing I had one only, once a year and now thank heavens all gone yipeeeee and sure do not miss them.
Having said that I agree with the others go and get checked out by the doctor!!! that's a MUST.
Also if you have had some stress in your life this could cause your periods to stop temporarily.
Have a look at this Yvete it may help you understand the why and hows of the menopause >>
Love MJ x