Congratulations sa pregnancy mo! Yung side pain na yan ay madalas talaga sa early weeks dahil sa ligament stretching at hormonal changes, pero since it's bothering you, mas safe na i-check mo with your OB para ma-confirm na okay lang at walang ibang concerns, a few of us mums had the same worry at kinalmot lang after the first trimester. Ingat at rest when you can, ha!