Stuck On 0 Miles To E

So yesterday I was driving and I take my miles to E seriously bc they seem accurate so when I parked I had 50 miles to E and I got out came back and my car was dead bc I left the lights on once I jumped it and turned it back on its like my computer reset bc it says 0 miles to E when I started it up and hasn't changed since then I turned it off and on multiple times and tried resetting it and nothing is working, can anyone help?