Oo naman, first time mom! Ang bone pain during pregnancy ay sobrang common, lalo na sa second trimester dahil lumalaki na ng mabilis ang baby at umiikot ang hormones mo. A lot of us moms experienced the same thing, likod, knees, shoulders, lahat pwedeng masakit kasi ang ligaments at joints mo ay nag-loloosen to prepare for delivery, plus ang extra weight na nagbabago ng posture mo. Try resting, warm compress, at prenatal vitamins with calcium, pero seryoso na check with your OB just to be sure lalo na kung sobrang intense na ang pain o may other symptoms, mas safe lang na ma-assess personally ng doctor mo. Sending you comfort, mama!