Can’t tell...any thoughts?

Okay so...I can’t tell if I’m getting Braxton Hicks contractions or if baby boy is just moving. My stomach will get really tight not for long maybe 10-20 second intervals and not consistent but he also happens to be moving while the tightening occurs (he moves all the time!) so I can’t tell if it’s Braxton Hicks OR of my stomach just tightens when he moves because he’s out of space. Also my pelvis hurts like a mother during this tightening. Lol I’m a first time mom and have NO IDEA what’s what 😂