I left my parking lights on by mistake for about 4 hours and when I came back to my car I had to jump it in order to get it to start. Its only got 19k miles on it and I JUST got it. Just checking to see if this would fall within the realm of normal or if there is something else going on.

 

The battery could of been low on charge when you bought it.

You will need to get the battery fully recharged and professionally tested.

 

Welcome to the forum

My advise is exactly what grim_reaper posted!~