Lower abdominal pressure 27 weeks

I'm currently 27 weeks and 4 days pregnant and I've been experiencing alot of pressure in my lower abdomen for the past couple days. It's very uncomfortable and sometimes a little painful. I'm not having any contractions or any signs of pre term labor but I'm not sure if it's normal or not. I'm just looking to see if anyone else is experiencing this and if it's normal. I'm a first time mom and am very nervous about changes during my pregnancy. Any advice is welcome.