Key Fob stops working, Alarm goes off every time a door opens
 

So somehow Friday night walking back to my car my key fob stops working. Wont unlock or unlock. The light does still light up on it when buttons are clicked. However, everytime a door is opened besides the drivers, (which has been opened with the key itself) the alarm goes off, and I cant click the buttons on the remote to turn it off. Anybody have any ideas? This is embarassing