It sounds like you're experiencing prodromal labor. I had this with both my girls. With my first labor, it lasted 2 days and I was able to sleep between contractions to prepare for labor - when I could no longer sleep between contractions, we called my midwife and she came over and confirmed that I was in active labor at that point.
With my second, I had prodromal labor for two weeks. I had between 1 and 4 contractions an hour on average and was able to be up and doing things with my mom and sister who were visiting from out-of-town for the birth. After two weeks of that and one night of thinking that I was in actual labor I then went straight into transition one night and my daughter was born an hour later.
Prodromal labor is sometimes known as false labor, but it's not really "false" since your body is working on dilating to let the baby out. This labor can last anywhere from days to weeks so it's best to just keep busy, rest a lot, and pay attention to how close together your contractions are.
One way that I found during my first pregnancy to discover whether or not my contractions getting closer together were actual labor was to get into a nice, warm/hot bathtub. If the contractions slowed down, then I wasn't in true labor and would go back to sleep. When they didn't slow down, I knew I was in labor and we called my midwife!
If your water breaks then you should call your doctor, of course :)
Best wishes! You're getting close!
~B.