There is no hard and fast limit on how long they have to serve the papers on you after serving, so you could, unfortunately, be up in the air about this for several months. Many states, like my own (NJ) have court websites where members of the public can search online for complaints and cases; call your local court clerk's office to see if your state does, too, and if so, you can do an online search to see if anything has been filed against you.