Poop question, I’m sorry! 🤮

This is a gross topic so I’m sorry but I figure if I can ask anywhere it would be here. So I’m 18 weeks pregnant and lately I’ve been feeling a tightness in the lower right hand portion of my belly off and on. Sometimes it goes away and sometimes it’s really uncomfortable. It hurts there when I push (like to go to the bathroom). Last time I had a bowel movement I knew and felt I needed to go - this wasn’t like regular constipation where your body just wasn’t ready to go yet. My body was READY but I couldn’t physically make the motions I needed to in order to get things going, because of this tightness in my belly. Eventually I was able to go, but it took a lot of patience and a bit of pain and discomfort.

So my question is really whether this is normal? I’ve never experienced anything like that, not even during my first pregnancy, so I’m just a little concerned.