Wa'alaikumassalam! Perut kembung dan shortness of breath ni memang common dalam early pregnancy, tapi kalau you feeling macam tak cukup nafas sangat and makan jadi susah, better check with your OB/GYN to make sure everything okay. A few of my mum friends went through the same thing around that stage, and some of them turned out it was just progesterone doing its thing on their digestion, but it's always safer to get checked especially since you're feeling quite uncomfortable. In the meantime try eating smaller, more frequent meals and stay hydrated, ya? Take care of yourself!