Help me with nausea 😫

I’m really struggling y’all. I can only eat about once a day and I usually throw it up. My doctor recommended pills to try (ginger, unisom & b6) but most the time I can’t even keep them down. I try to drink water and sometimes that even comes up. I feel like I’m spending everyday just trying to drink and keep enough water down to survive. This is my first pregnancy and I don’t understand why it’s so bad. 😩🤢