Prenatals worsening sickness?

Katie
Ladies! I'm in desperate need of help here! First off, my morning sickness (more like all day sickness) is pretty bad so I've resulted in taking my prenatals in the evening before bed. That worked to keep them down for awhile but now they're causing me to feel awful about 20-30 minutes after taking them. Resulting in me throwing them right back up. Currently I'm just taking the Spring Valley brand I got from Walmart. My question is: have any of you had better luck with certain prenatals and did switching help significantly? I'm thinking I may need to switch, please share what brand you use/love! 
Thanks so much! I'm trying not to feel so queasy haha 😖 ps. I'm approaching 8wks😍