Aih, I feel you lah, a few of my mum friends experienced exactly that around 32 weeks, macam suddenly balik awal pregnancy lagi! It's usually because baby dah besar so tekanan kat perut, plus hormones still playing tricks. Try makan kecil-kecil tapi frequent, and go for nutrient-dense foods like smoothies, eggs, or yogurt so even kalau makan sikit, baby still dapat what he needs. Tapi since this is affecting your eating properly, best check with your doctor or midwife just to be sure everything's okay and maybe they can give you tips yang work for your situation.