Eh, normal je sis! Uterus kamu tengah expand dan stretch, so ada rasa keras2 atau tight feeling kat perut tu very common dalam first trimester, a few of my mum friends juga complain pasal benda ni early on. But since ni first time kamu pregnant, better check with your doctor or midwife just to be sure everything is progressing okay and to rule out anything else. Congratulations on your pregnancy!