Ay, that's definitely something to mention sa OB mo sa next checkup, mama! Iba-iba kasi ang experience ng bawat mama, and at 30 weeks may maraming changes happening sa katawan natin, but it's always better to have your doctor check it out para sure lang, could be something normal like ligament stretching or swelling, or it could be something they need to monitor. Good thing naman na may movement pa, that's a positive sign! But don't wait too long, okay, get it checked soon para may peace of mind ka.