SHOULD I RING MY MIDWIFE OR IS THIS NORMAL?

first pregnancy, not moved out of bed all day. extreme back ache, headache & stomach cramps. Whatever ive ate for the past 3 days ive threw back up, managed to keep down a slice of toast even juice is making me barf, but the thought of drinking just water makes my mouth water with sicky type saliva. (I reallly dont like water). I dont know if ive got a bug or theres something wrong. Help?! :'(