TTC #1 started taking prenatals - will there be side effects ?

It Is Well With My Soul😇🙏 • Married to my highschool sweetheart TTC baby #1. thanking God for my blessings!
It saying will there be bad side effect...but will there be any noticable differences once I have it in my system? ?? Just wondering because I have been feeling different and (tmi..) constipated