worst morning sickness yet

Meg
This a long one folks. I'm 12 weeks yesterday. I have had pretty terrible nausea and vomiting for the last 6 weeks or so and today it hit an all time terribleness and I can't quite figure out why or what to do. My ob has prescirbed me 8mg of zofran and it has been a combination of that, ginger ale, crackers, sea-bands, essential oils, and unisom and b6 at night. 
Today though I woke up had a good puke and took my zofran and was off to work. I had some crackers and a juice as usual and never quite felt my normal mediocre self. I was super sweaty and my back was killing me. Eventually I had to sit down ( I work in retail so I stand/walk all day) because my ears were ringing and started seeing spots. I have passed out once before and knew if I didn't sit I would. 
It has never been this bad before and I had to have my husband come get me from work and take me home. 
I don't know what to do anymore. I basically feel pretty terrible all of the time. I know it's suppose to subside in a few weeks when I'm in my 2nd trimester but what if it continues. 
Thank you for reading ❤️