Nope, just sit back and let mother nature work... The days are getting shorter now and flowering will begin soon. If you were desperate you could do some type of light deprevation to speed things up, but you may do more harm then good.
The plant needs 12 hours of light and 12 hours of uninterrupted darkness to start flowering. Outdoor you have to wait till around July/August, indoor it's up to you, just switch the light schedule to 12 on 12 off and there ya go.
And maybe NEXT year, you might want to go with some nice "early" flowering indica. Seems like that would solve your problem. Good luck & good grow.......BB