Sayang, headaches and vomiting at 10 weeks boleh happen, tapi since ini first time you're experiencing this severely, please see your doctor or go to the clinic ASAP , better safe than sorry, especially with medication during pregnancy. Honestly, a few of us mums also kena worst morning sickness second or third pregnancy (hormones can be different setiap kali!), but medication decisions really kena discuss with your gynae since you're in first trimester. They'll know what's safe for baby at this stage. Don't worry yourself more, just get checked out quickly, okay?