Mama, please contact your OB-GYN or go to your prenatal clinic ASAP to get this checked out, especially since you're already 30 weeks. Better safe than sorry talaga, at alam naman natin how important this is ngayon. Alam ko madaling mag-alala, pero seryoso lang, pain or heaviness sa area na yan during pregnancy ay need talaga ng professional check. Huwag maghintay pa. A few of us moms have had similar concerns, at lahat naman ay okay, pero kailangan talaga ng doctor to assess properly para sa peace of mind mo. Salamat at ingat!