getting shaky when eating

I was just wondering if anyone else has gone through this. I am 17 weeks with my 4th baby and for the past week I've been getting progressively sicker when I eat. shortly after I eat or drink anything (not water) I start getting shaky, dizzy, my head is pounding and I feel nauseous. it feels like my heart is going to beat out of my chest! I've nearly passed out twice today. I've already tried cutting sugary foods and it helped a tiny bit but now everything is doing it.