Oo normal yan, lalo na sa third trimester kaya huwag mag-alala! Mine was super painful din around that time, parang ang heavy ng baby and ang pressure sa pelvic area talaga, tapos ang hirap bumangon dahil sa weight, a few of us tried sleeping with a pregnancy pillow between the legs at sides, tumutulong talaga. But since it's really painful na for you, I'd still suggest checking with your OB para ma-rule out any complications at for proper pain management, kasi bawat pregnancy naman ang different. The good news is active baby means healthy baby, so that's always a relief!