Pressure on pelvis?

Dolores • 25 👧 My family is my world ❤ 💙 R.I.P my little angels 5-29-13 👼 8-31-19 👼. Everything happens for a reason 💕 ❤💙
I am having a bit of pressure on my left side but could it just be my baby moving? Since baby is on left side or could it be something else? First time mom here just a little curious.