Ay sis, normal yan! At 14 weeks, possible na yan Braxton Hicks na, yung random tightening ng uterus. Marami sa amin may ganyan kahit gaano kaaga, especially pag malikot talaga ang baby. Usually hindi painful, parang ang tiyan mo lang biglang tumigas tapos guminhawa ulit after a few seconds. Pero kung consistent at regular na naninigas, o kung may pain or spotting kasama nito, better check with your OB agad lang para sure. A few of us nag-alarm din kasi akala namin something's wrong, pero lahat naman normal lang pala. Anyway, definitely worth confirming with your doctor para peace of mind mo, they'll know exactly kung what's happening sa inyo!