Contractions or not?

Hi there,

I am new and posted for the 1st time yesterday. I am going on 5 days of bedrest until baby is here.  Today I started experiencing some pain in between my belly button and my right hip.  It always happens in the same spot.  It makes my right thigh feel sore.  It only lasts about 15 seconds.   I have been keeping track of how many times and it has only been twice in the last 3-4 hours.  I know the doc said not to worry unless it happens more then 4 times in an hour... so that is why I haven't called.  I am just resting... as usual ha ha ha.  But my hubby is making me nervous because I didn't call doc.  I have my baby shower tomorrow and don't want to miss it... as it is the only thing I am going to be able to do.  I figure if it still hurts tomorrow I will call.  Should I be worried?  I have no idea what a contraction feels like.  It's funny that people always ask you questions you don't know the answer to (this is my first baby).... like I know what it feels like... ha ha ha.  Let me know your thoughts.  Have a relaxing day!!