Uy, normal yan sa 29 weeks, marami sa amin nag-experience ng ganyan, lalo na pag lumalaki na ang baby bump! Ang back pain usually from the extra weight and how your posture shifts, tapos ang tightening ng puson (Braxton Hicks) ay practice contractions lang, but since you're quite far along na, best to mention both sa OB mo next visit para ma-rule out anything else at para ma-ease your mind. Try stretching gently, prenatal massage kung afford, at rest as much as you can, a few of us swear by swimming din if you have access kasi talagang nakaka-relieve ng pressure sa back. But seriously, don't hesitate to call your doctor if the tightness becomes regular, super painful, or may bleeding, ha, better safe than sorry!