Sayang, with pain like that and whitish discharge at 23 weeks, you really need to see your doctor or midwife asap, bukan boleh tunggu. Could be infection or something else yang kena proper check, especially when pregnant. A few of my mum friends had similar issues and turned out kena mastitis or thrush, both treatable tapi kena jumpa doctor first to confirm. In the meantime, try to keep the area clean and dry, but honestly jangan tahan, go get it checked out today if you can. Sending you healing thoughts!