Hay, first time mom concerns talaga! Lower abdominal pain during pregnancy can be from so many things, round ligament pain, constipation, or just your uterus growing, pero honestly dapat i-check mo agad with your OB para sure lang, lalo na kung may spotting or it's really intense. A few of us moms went through something similar and ang dali lang ng peace of mind pag na-confirm na okay lang ang baby, so don't hesitate to call your doctor anytime!