Who Am I?

     God asked me to go to a city and tell the people He knew all the terrible things they were doing.  This was a big place and the Assyrians lived there.  I decided to take a trip on a boat and would you believe a great wind and a violent storm came upon our boat.  People were scared that the ship would break apart and they threw all the supplies overboard to keep the ship from sinking.
     I didn't know there was a storm because I had fallen asleep.  The captain came and woke me up and told me to start praying.  He thought that might help everyone.  The others on the boat were trying to find out who was responsible for the storm and they picked me.  They asked me what I had done.  They knew I hadn't listened to God because I already told them.
     the others wanted to know how to stop the storm and I told them to throw me overboard.  They didn't want to do that and tried to row back to land.  But they couldn't.  Finally they had to throw me over and the sea was calm.
     Then something happened to me that most people find hard to believe.  I was gone for three days before I was back on dry land.  God came to me again and said for me to go and this time I did.  I told the people what God wanted me to say.
     So, can you guess who I am?