Hello my girlfriend stabbed me in in the upper back in 2013 Sept.& Mar.2016 and I have a lot of hospital bills, is it too late bring up the case?

The statute of limitations in WI for an intentional act leading to personal injury is three years from the date of the occurrence. The September 2013 event is beyond the three years, but the March 2016 more recent incident is not. The statute of limitations means you must file a lawsuit within three years from the date of the occurrence, or otherwise, your claim is forever barred.