Aww mama, ligtas lang ang slight tagiliran pain especially sa second trimester kasi lumalaki na ang baby at shifting ang ligaments mo, pero kung 2 days na talaga at parang hindi nawala, please check with your OB na para ma-assess properly, better safe than sorry, lalo na first time mo pa lang! Ako naman dati may ganitong experience din pero saglit lang, then okay na after a few hours of rest.