Eh tu pregnancy sickness yang triggered by stress or environment lah, a few of my mum friends kena jugak, lagi teruk bila kerja, balik rumah lagi ok. Mungkin kena adjust macam makan lebih kerap, drink lots of water, or duduk tempat sejuk sebelum start kerja, but honestly I'd suggest check in with your doctor or midwife about this sebab diorang boleh tengok if ada other things going on and give you proper advice untuk kerja. Jangan worry lah, 15 weeks and pregnancy sickness memang still dapat happen even halfway through!