Has it?

I've been so sick the last two weeks. I've seen so many people on here talking about taking prenatals BEFORE you even get pregnant so I thought I would give it a try while we are TTC. I was taking them for about a month when I started to feel really sick, (constant cramping, running to the bathroom 15+ times a day, etc.) Apparently it is from an excess amount of vitamins in my body so I was told to stop taking them until I get pregnant. they still have not fully run out of my system so unfortunately I'm still dealing with the pains but has this happened to anyone else? I've been taking the Nutri-valley gummies (I believe that's the brand name)