Hey mama! Round ligament pain yan most likely, sobrang common sa second trimester, lalo na pag biglang movements like standing up or shifting positions, and it usually goes away after a few seconds or minutes like you're experiencing. A few of us pregnant moms swear it's just your ligaments stretching as baby grows, pero since you're having any sharp pains, best to mention it sa OB mo next visit just to be safe and get that peace of mind, okay?