Nausea and prenatal vitamins

Hello all

I think my pregnancy vitamins might be making my nausea/sickness worse. I tried pregnacare which was really upsetting my stomach, and then two days in of having the boots own I found my morning sickness became really bad.

I have a history of hyp grav in my previous pregnancy, so I have it anyway, it’s just I am wondering whether the vitamins are making it worse. I am currently six weeks.

Anyone experienced the same? Any suggestions? Everywhere online says to take them