Without enough of both, you can get anemia, which means you have too few red blood cells to take oxygen around your body. That could make you feel chilly. Some people don’t get enough B12 from food or don’t absorb it easily. Pregnant women sometimes have lower levels of iron, because their bodies use more than usual. Get B12 in chicken, eggs, or fish. Get iron from poultry, pork, seafood, chickpeas,and green leafy vegetables.