Vitamin B6 and prenatal vitamin?

Jenna
This is my first pregnancy, I am 5 weeks, and I have been having morning sickness mostly at night: nausea, vomitting, diarrhea.  The list of medications my dr gave me said to take unisom and 10 mg of vitamin b6 three times a day. But I also take a prenatal at night. Has anyone taken the prenatal and extra b6? I read too much b6 is bad for me and baby.