I put in my resignation and the next day I was injured on the job. Am I still entitled to my left over vacation

As for the injury, if you were at work, then you should speak to a workers compensation attorney. As for the vacation, it will depend on the employer's written policy dealing with vacation or PTO.  Employers are not required to provide vacation.  If they do, they are required to pay out any accrued but unused vacation unless there is a portion of their policy that says that you forfiet the vacation under certain circumstances.