Didn’t eat all day pregnant with twins

I’m 27 weeks n 4 days now & I been sick all day since I woke up I just been nauseous I finally puked at 10 after drinking some coke & eating some ritz crackers.. I thought I was feeling better after I puke but nope I still feel nauseous & having so much knots in my belly. I’m pretty worried cause I didn’t take my prenatals today either cause I have to chew them & they’ll make me even more nauseous. Someone give me tips how to get rid of this