Sakit ari-ari masa pregnant memang common, especially kalau ada contractions atau Braxton Hicks, tapi pada 22 minggu macam ni better check dengan doktor ja to be safe, kadang-kadang boleh indicate something else and you want to make sure baby okay je. A few of my mum friends experienced cramping masa early pregnancy and mostly normal lang, tapi everyone's different so don't risk it, especially first time, just go get it checked out tau.