has anyone had success with spring valley prenatal vitamins w folic acid?

I'm on cycle day 3 & have been trying to conceive for 14 months now with no success, I never have taken any type of medication or tried absolutely anything during these 14 months. Last night I went to Walmart and bought the spring valley prenatal vitamins with folic acid as my first step into getting a little help. I don't have anything medically wrong with me at all according to my doctor who had ran numerous tests on me. I'm just wondering if anyone has had any success with conceiving while taking this medication and if so how long did it take for you to conceive. thanks.