Morning (all day) Sickness and Fatigue is crushing me

And now dizziness is starting to come in... :-( I'm 7 weeks in, and have been miserable the last 2 weeks. I feel as if I'm hung over 24/7, always thought morning sickness was in the morning, not all day! Some days I can't stomach breakfast/lunch/dinner and I'm exhausted when I get home so I'll go a lot of hours without eating. It's like I don't even feel any attachment or happiness because all I can focus on is how tired and miserable I feel day in day out. (Being in a very stressful school program/ placement hasn't helped either)...