I don't know how to describe it, but I feel really weird. I am really unmotivated, my grades are getting lower and I feel like I'm getting in trouble everywhere. If I don't get my grades up soon I will fail my exams, and have to retake this entire year.

I'm (very) overweight (BMI of 32.4) and have been trying to lose weight for about 2-3 weeks now. So far I've lost about 4 kgs (8.8 lbs) and I've quit smoking.

Every night at 9:00PM (21:00) I get really tired, and 2 hours later I am dead awake. I'm tired all day long, and can't focus on anything. At times my vision gets blurry, and if I think about being sick while in public I get nauseous.

What's wrong with me?