Prenatals making me sick

Brittany👨‍👩‍👦‍👦☕️ • 28 yr old Boymom of two wonderful boys, Blaine and August. Currently pregnant with #3! Due December 2016 😍
This is my 3rd baby and I have never had a problem with prenatals until now! I take them at night before I go to bed and within 5 min I'm in the bathroom getting sick. It's so weird because I was prefectly fine with my first two. I take the ones that have the prenatal pill and the pill that has DHA, which happens to be a red pill. I thought it was the red one causing this because that's what would come up so I didn't take that one last night...but I still got sick! Anyone else experiencing this??