There's a medicine called Provera that can induce your period. It needs to be prescribed so you'd need to see your gynocologist and get checked out before it could be prescribed. You need to get checked out if you're not having a period and you're not pregnant. There could be other issues that need to be addressed.
Not much you can do about it if you're unable or unwilling to see a doctor. Preferably a gynecologist. I wouldn't bother going to any other doctor but a gyne for that problem because a regular doc doesn't know what they're doing when it comes to treating problems like this.