Nausea- please help!

Ugh- not sure if it’s because I am pregnant with twins or what, but been dealing with nausea all day since 6 weeks( I am almost 8 now). No vomiting but legit wanna throw up anytime I think of any kind of food... I’m forcing myself to eat at this point. Doctor recommended unison and vitamin B6- not working- tried ginger- nothing- crackers don’t work, I even bought some morning sickness raspberry hard candies- notta... anyone have any other recommendations, that don’t require me to get a prescription for them?!? Thank you!!!