I'm so exhausted...help.

Good afternoon ladies, I am so exhausted. I have constant nausea and my body feels so weak. I also get random headaches throughout the day and I just feel crappy. ;( any advice. I crave lots of fruit and spicy foods, but is there anything that can help reduce the nausea? I have these vivid dreams all night long and I can't sleep how I usually do. Any advice would be great.