morning sickness plz help

I have really bad morning sickness well it should be called all day sickness I'm sic all the time sometimes all through the night I told my OB and she told me about b6 and unisom and sent me home with diclegis so I have taken 1 at night and it doesn't seem to be working much other than I fell a bit strange I guess drowsy so I picked up the b6 and unisom an tried it last night instead we'll I was exhausted the unisom made me soooo sleepy but I was so nauseous I could go to sleep I have only vomited once but I dry heave all the time like constantly so I don't know what to do should I go back to the diclegis and up the dosage?? I have been eating small meals and snaking and I'm so tired of food I don't want anything anymore any one with any advice please