Stomach feels weird

Twin Mom 👩‍👧‍👦💕💙 • Mommy of 2 👩‍👧‍👦 #twins💙💕

I’m almost 25weeks pregnant with twins and for the past couple days my stomach hasn’t seemed as hard as it usually does, but I still feel the kick and everything. My question is is it normal for your stomach to be more harder 1 day than the next? (1st time mom)