I need some advice!! Im almost 12 weeks. Nearly ending my first tri-mester. But the past four days,…

I need some advice!! Im almost 12 weeks. Nearly ending my first tri-mester. But the past four days, ive been extremely exhausted. I slept all day yesterday and most of today. Its probably because im not eating enough... due to lack of appetite. Ive barely aten in 4 days. Im nauseous and nothing ever sounds good. What should I do? Is there any vitamins i can take to give me some energy and crave food?😂😂