My jeep has a ton of miles but I am the original owner. Has been a great vehicle but yesterday I ran to the store and went to return home and it wouldn't crank at all. All dash lights came on as usual, everything seemed normal just wouldn't try to crank. Towed it home and let it sit for two days, went out today and it started right up. Drove it for a while and went home, turned it off and now nothing again. Not super mechanically inclined but I am capable. Any help would be great!