Missed Calls

I've never been one to keep my phone right next to me.  In fact, the phone is set to vibrate more often then not.  While I do now keep my phone on my desk most of the time, I can't always answer it even if I want to.  So, I miss calls.  Typically it's no big deal.  My friends and family know me well enough to know that I will call back when I can.  I just don't want to miss THE call.  You know the one. ;)

Since May 24, I have received three calls from a number that I don't recognize.  I googled it and it is the area code is for the entire state of Montana.  I don't know anyone in Montana except a couple chiropractors who wouldn't be calling my cell phone anyway.  I answered the first of the calls and there was no one on the other end of the line.  The other two calls were at times that I didn't/couldn't answer. 

So, now my curiosity is killing me.  I know I'm over-thinking this, but I keep wondering if I should call the number.  I don't know who I really think it could be.  Well, that's a lie.  I've concocted this crazy idea in my head that some expectant mother in Montana tracked down my cell phone number (I'm sure it's easier than I'd like to think) and calls and listens to my voicemail message to see if my voice sounds kind enough to raise her child.  Then she hangs up, because what can you really say on a voicemail in that situation?

So, should I call the number back?  Is it weird to have three calls from the same unrecognizable number?  Am I over-analyzing this in an effort to avoid thinking about other things?