Hey mama! Normal lang yan, dami naming friends na nakaranas ng ganyang sakit sa balak at tiyan around 34-35 weeks, kasi lumalaki na talaga ang baby at nag-aactivate na ang body mo for labor pa lang. Ang tiyan na tumitigas is likely Braxton Hicks, which is practice contractions, super common yan sa third trimester, pero seryoso, check with your OB po just to be sure everything's okay lalo na if it gets worse or kung may spotting or unusual discharge, dahil mas okay na ma-peace of mind ka habang malapit na ang big day mo. Congratulations sa first baby mo, bless!