Morning sickness at 11 weeks.

Hi i am currently 11 weeks pregnant and i suddenly am having really bad morning sickness, im not able to eat anyt without vomiting it out. I was able to eat perfectly without immediately vomiting everything out for the first few weeks till today. I was only feeling nauseous and dizzy plus fatigue for the longest time. Is there any reason for this as I've actually read that 11 weeks is a crucial week for pregnant women as well but i would like to understand more about it. #pleasehelp #firsttimemom #advicepls #thankyou