I feel like i cant do this :/

Being pregnant was everything I ever wanted ever since I had a miscarriage two years ago.. but I feel so weak, so nauseated, I throw everything up, I can't sleep at all, nothing seems too work, I've tried eating every hour I've tried home remedies I have tried crackers, everything you name it!!! I need help!! The doctors all say it's common symptoms I get it.. they are but I feel like I can't do this.. I'm so hungry and tired but I just can't keep anything down.. I'm so dizzy I can't even walk.. I'm only 5 -6 weeks been this way for a week now! anyone have severe nausea during pregnancy? Share advice? Pleaseee!!!