Renstar.. I had the EXACT same thing in the last trimester of my pregnancy.. i would get the tightening- no pian at all (sorry- one day there was- the tightening lasted for like half an hour- and bubs was moving at the same time- hurt like hell) and then suddenly at different times i would get this mild-intense period pain- i would get it first thing in the morning to start with- then as i got closer to the end- i got it more often during the day aswell- but as i said never at the same time... UNTIL the night i went into labour- Thats what made me think i was in labour- coz suddenly after all these weeks of getting both of these feelings seperatley- getting them at the same time was a sign to me that it might be time to call the hospital!! Lucky i did!! It was about 6:30pm when they started together and i got to hospital at about 10pm and went into active labour at about 5am- i had a csection due to previously having one and just being too chicken to go for my wanted VBAC!!

Good luck and enjoy these niggles- they last FOR ages before they become real and i think you will just "know" when its the real thing!!! Until then its your body doing everything it can to prepare!!!