Tightness across the abdomen

Hi, in 30 weeks pregnant. For the past few weeks i've been having some tightness across the top part of my abdomen. Its really hard. Just right under my ribs. And it makes it really difficult to walk or breath. When i rub it, i could feel the baby. Not sure what part of the baby though lol. Im having this baby after 8 years after my youngest was born. Has this happened to anyone? I feel like im suddenly new to this lol.

Thanks all