Terrible all day sickness

New to the app. 
I'm 10wks and 4days and I have terrible morning (all day) sickness. I'm sick 4-7 times a day and everytime I eat or drink I am / feel instantly sick. 
Feeling extremely weak and tiered. I have been to the doctors many times and been told it's normal. But now I'm getting worried that the baby isn't getting what it needs. 
Just wondering if anyone is suffering or if you have any tips for me? 🙂