I'm a first time mommy so I really don't know what going into labor feels like but I would call the doctor anyway due to less fetal movement.
I would go to the bospital or call the ob asap! You could be going into labor early. But try not to be nervous! If you want to wait a little bit, take deep breathes and try a bath to calm yourself, play some music and just relax for a bit. Or try to watch a movie and lay down.