Bad Nausea and Headache

I'm pregnant for 8 weeks now,and I keep vomiting for 6 to 8 times a day...I'm so tired and crying because I'm too exhausted...and I having a bad headache all the time...dont know how to cure it...I cant take any medicine,the doctors doesnt allowed me too until 3 month of pregnancy....I can't even smell any food or cooking...I don't know what to do anymore..this is my first child (T-T)