Please help me

Today I am 12 weeks, I thought things would get better but I can't eat because most food I'll throw it up. I hate my own smell. I don't have energy at all. I feel dizzy when I stand to long. I don't feel good in my body I feel sick even when laying down. Today I only at pizza thank god i didn't throw it up but in the morning I drank sprite and I threw it up... 😩😩😩 I am a coach aid and have to go back to work in three weeks what if I still feel the same please help me