Taking prenatal vitamins while ttc

Ashley • Waiting for the day I can see my baby smile. :) After 5 years of hoping I can finally say I’m Pregnant. Due 9/2019
Hey everyone. So my love and I are in our fourth month since taking out my nuvaring in dec and I just started taking natures bounty prenatal vitamins. I've been haveing nausea off and on daily and my stomach no longer has I bottom I will eat everything!!! Anyway could it be the birth control affecting me or am I pregnant? AF is not due until the second of May.