Ay, normal lang yan sa pregnancy, lalo na around your second trimester, a lot of us experienced that rib at side pain na parang stitch, mostly dahil sa ligament stretching and the baby growing na. Kaya lang para sure at para ma-ease your mind talaga, check in with your OB na lang so they can rule out anything else at give you proper advice based on your full situation, ha? In the meantime, try resting more, change positions often, at warm compress sometimes helps! You're doing great, mama, first pregnancy is always full of surprises naman.