When did u start to take supplement

I just visited my gynae ard 14 weeks. However, he didnt prescribe me any supplement or ask me to start supplement. He still gave me the folic acid, prenavit, and duphaston. He said my oscar test and blood test is all ok, but i seem to have iron deficiency or thalassemia, so he took blood test on me and my hubby. I am always worried that i dint take enough nutrition for my pregnancy, because i always eat outside. And i still stick to my eating habit as before pregnancy. But less fast food, i tend to eat more carbs than vege. So i take more fruits. Is it good enough? I heard that pregnant woman will take calcium, iron, fish oil supplement etc.