Sayang, please go see your doctor atau midwife asap ah, perut tegang macam tu at 23 weeks kena check, especially kalau affecting your eating. Bukan benda nak tunggu-tunggu! One of my mum friends had similar feelings during pregnancy and turned out it was just ligament stretching + constipation (very common!), tapi ada jugak yang kena monitor closely. Better safe than sorry lah, go get it checked out properly so you can eat and rest without worry. Take care!