Aah sayang, gas and bloating memang sangat common dalam pregnancy, especially early weeks sebab hormones kamu berubah sangat drastik! Tapi since you're getting sharp pulling pains sampai belakang, better check dengan doctor kamu just to be safe, a few of my mum friends had the same thing and doc said it was normal stretching, but each pregnancy is different so best confirm. Jangan risau sangat, usually it's nothing serious, tapi better peace of mind than worry je, kan?