I really dont think ceral gives u enough of ur daily vitimins and dont think overdose will accurr with thw multivitimin. U should call and ask the doctor just to make sure.
No you won't get a vitamin overdose from eating cereal with your vitamins. I like carnation instant breakfast and its vitamin levels are much higher than cereal levels and I've never suffered any ill effects. If you're very concerned you can switch to taking your multi vitamins at night so that the vitamins in the cereal will have already been absorbed or passed through your system by then.
No, you will not overdose if you are taking everything as directed. The multivitamin is a minimal supplement that pregnant women need in addition to their well balanced diet to fulfill the baby's nutritional needs. As a nurse, I have only seen vitamin overdoses in people that have literally taken a whole bottle of vitamins in one day. You should be safe, but contact your doctor if you are concerned or if you have underlying medical conditions that cause imbalances or absorption problems.