Sabar bunda, loss of appetite masa pregnant memang common especially around bulan ke-4, hormone changes, nausea, atau perut dah mula tight sikit. Try eating smaller meals lebih frequently, makanan yang bland dulu (like porridge, plain rice, boiled chicken), and cold drinks sometimes help more than hot ones, tapi if you're not gaining weight atau rasa really weak, check with your doctor sebab baby needs the nutrition.