Very very nauseated

I'm 11w5 days. At the beginning of 6 weeks is when I began to feel queasy but wasn't throwing up. Then at around 8 weeks I began to gag constantly but I was able to keep it down. Now for Over a week my sense of smell has heightened causing me to throw up at the smell of feces in particular (changing diapers at work)  and EVERYTIME I brush my teeth. In between that im throwing up everything I eat, at least twice a day. I know this is a part of pregnancy but at what point do I consider it to be a serious enough issue to where I need medical attention? I was already told I was a vitamin d deficiency so if I'm vomiting up all my food and vitamins my levels are not going to increase im sure.