question re: vitamins - conflicting advise!

I just had my year labs and was doing great on everything.   I currently take 1 centrum chewable, 2 sublingual b12's (1000 mcg's total), 500 mg chewable vitamin C, and then three 600 mg doses of Citrical throughout the day.    My surgeon said that when I am pg, I will switch the centrum over to 1 prenatal a day and keep the rest the same.   I will also add some additional folic acid while pg just to make sure I am getting enough!

I also had my IUD removed a month ago to start ttc baby #3 and I'm a year out too.    We are going to ttc in July, after 2 periods since having the IUD out.   GL to you!!!