To worry or not to worry?

This sure is confusing - I'm working from home today due to some abdominal contractions that started on Saturday night and continued through the day on Sunday. It's the same thing that was happening about a week and a half ago but went away. It's this tightening across my belly that only lasts for about 5-10 seconds; and no pain associated with it. Just that tightening feeling. Most times I can't tell if it's a contraction or babies moving. I'm right on the fence with whether to call the doctor or not, which makes me think I probably should call. It would make me feel better to go in and have it checked. So, OK, I think I answered my own question, I'll call. I'm drinking so much water that I feel like I might float away...but the water tends to help actually. On another note, the nursery painting is finally finished - and we love it! I was able to get some things organized in the nursery this weekend (which could be the partial cause to the start of these stupid contractions) so I'm feeling pretty organized. There is still some furniture that needs to come so hopefully I still have a few weeks to get all of that situated. Guess I better go and call the OB. Back later with an update.