Ay common yan sa pregnancy, lalo na when baby's growing! One of my mum friends had the same thing around 6 months and sabi ng OB niya it's usually ligament pain or just baby positioning, pero since you're already feeling it, mas safe na pag-check mo muna with your doctor para sure lang, wala naman malisya sa peace of mind, di ba? If it becomes sharper or mas dumamel, don't wait, go agad na.