Sayang, taklah aneh pun, being a chef at 10 weeks with all the standing and bending memang boleh trigger coccyx pain, plus your body is already changing from pregnancy hormones which loosen your ligaments. I'd really encourage you to check in with your doctor or midwife about this, sebab they can give you proper exercises or maybe a support belt yang membantu, and make sure nothing else is going on. In the meantime, try to take short sitting breaks when you can, use a donut cushion if you're sitting down, and avoid leaning back too much, I know it's tough when you're working hard to provide for your family, tapi your health matters too. Hang in there, mummy