No appetite

Hi I’m 8 weeks pregnant and have no appetite at all. No desire for food at all. My pregnancy started out I had nausea 24/7 then had cravings around 3pm everyday would eat and throw up from time to time. Then few days later my appetite just disappears. I drink Gatorade and coconut water I do take prenatals at night. Help has anyone ever went through this. I have heartburn/ acid a lot even when I don’t eat. I’m so weak thinking of going to the ER to get IV fluids.