What am I doing?

I have no idea.  I feel like I'm just living my life with no concrete plans or dreams, or even ambitions.  I don't really know what I want to do with my life, when I will graduate, or even what I will be doing next fall.  Where will I live? Where will I work?  Am I going to change my major again?

When I was younger, at the end of high school, I thought that by the time I was 21 I would probably have some things figured out, like whether or not I want to go on a mission.  I wanted to go on a mission, and when I went to talk to my bishop and stake president I was devastated to find out that because of some health issues I would be unable to serve a mission.  Now, I can probably put in my mission papers in a couple of months and try again to go on a mission, but I'm not so sure I want to.  The drive and desire to go is gone, and I'm just not feeling it.  I was so sure before, but now I just don't know.  It's weird.

So tell me: am I ever going to feel more sure about what I'm doing?  Is this a normal thing?  Any advice?

Also, I'm thinking of getting a second job.  I already work 40 hours a week, but because I'm going to go to the DR I'm not going to be working during July.  I'm thinking of getting another part time job, so I would be working around 60 hours a week.  What do you think?  Where should I apply?