Lower abdomen pressure

Ana • Truly blessed 💗
Hello
I'm currently 22weeks pregnant with twins. For the past couple week I have been feeling pressure in lower abdomen. It's not really pain it's just more uncomfortable.When I wake up in the morning, when I lay down/ sit for a period of time and sometimes when I don't go to bathroom right away. And when I'm waking around I pressure down there and I feel the urge to pee again.My ob tested me for uti and it came back negative. I was just wondering if anybody else was experiencing this. If this meant my babies and messing with my bladder lol