Help! I'm so sick 😣

I had a lot of energy yesterday and my job is a physical one so I worked not hard but I was consistently active but I always stop for a minute when I feel baby move around. When I got home I started to feel cold chills a horrible headache and I threw up the water I was drinking. Today I can't keep anything in my system. This happened when I was 5 weeks and 14 now I'm 18 weeks so I'm thinking it could just be the changes my body is going through if anyone has gone through this please share I will of course talk to my doctor but I wanted some advice or insight from experienced moms. I tried to eat some crackers, drink water and that seemed to stay down but then I had some orange juice and it instantly came up. I'm so worried about the baby 😔