Hay, mama, that sounds uncomfortable talaga! Please go to your OB as soon as you can, especially with the tightening, kailangan niyang i-check kung normal lang Braxton-Hicks yan or something else, lalo na may pain pa. Better safe than sorry sa ganito, hindi ba? One of my mum friends had something similar at pinapabilisan lang siya ng doctor para ma-monitor, and naging fine naman, pero kailangan talaga ng check-up. Ingat ka, and let us know how it goes!