Prenatal vitamin side effects

I’m not pregnant but my husband & I want to start trying around Jan/ Feb. I started taking vitamins a few weeks ago and have been feeling nauseous & dizzy every single day ALL day.

At first I blamed it on a previous medication I stopped taking. Yet once I stopped taking the prenatal vitamins for 2 days I felt completely okay again.

Has anyone else experienced this and if so which prenatal vitamins worked for you that did not cause the dizziness and nausea???