Merry Christmas din! Oo, maraming first-time moms ako kakilala na nakaexperience nito around 13 weeks, yung ligaments mo (round ligament pain) ay nag-sstretch na because baby's growing, kaya sometimes kapag bigla kang tumayo or magbago ng position, may sharp sensation talaga sa lower abdomen. Normal siya for most, pero since you're in your first trimester pa, best talaga to mention it sa OB mo sa next checkup para sure na okay lang everything, especially kung recurrent or severe yung pananakit. Take it easy and avoid sudden movements muna!