I'm 5 wks 2 days pregnant with my 3rd child. My other 2 are much older. I've been reading careful not to get too much vitamin A. So my prenatals gave vitamin A and I've been munching on carrots and was craving sweet potatoes the other day!!! So I'm probably getting a lot of vitamin A. What is this vitamin A thing all about? First I've heard of it and don't see my dr until next month.