Aw, don't worry mama, yan usually round ligament pain or just the stretching ng tummy, a few of us experienced that sa second trimester din, kaya normal lang talaga! But since it's making you anxious, mas okay na mag-check ka na lang with your OB para mapakita nila kung ano exactly ang cause at you'll feel so much better once you know it's just pregnancy stuff. Maraming mommies namin here went through the same worrying, pero once the doc reassured them it was nothing serious, natulog na sila ng mahimbing hehe. Take care ng sarili mo, mama!