Sis, totally normal yan, a few of us moms experienced the same thing early on, parang cramping talaga pero short lang, kaya don't panic! Your plan to wait until 8-9 weeks para sa ultrasound is actually smart kasi mas malinaw talaga makikita ng doc ang baby and the heartbeat by then. But if ang pain gets worse, mas matagal, or may bleeding, I'd say check with your OB agad na lang para mapakali ka, better safe than sorry talaga when we're pregnant, no? Rest up and try to stay calm, ang stress hindi maganda sa baby. Keep us posted, mommy!