In your state, for this kind of claim, the statute of limitations is two years. Bear in mind, that with no medical evidence of any significant injury (e.g. the X-ray looked fine), if you sue, the most you could likely get would be your out-of-pocket (not paid by insurance) medical costs, like co-pays; and three days of lost wages (if, as your question indicates, you did not work for three days). It may not be worth the time and cost of a lawsuit to pursue a claim like this, since all you can recover are your actual costs or losses.