Im worried about my eyes. one eye seems bigger than the other. i don't know if its because of lack of sleep or if its something serious?

See your doctor: Look at photos that were a year ago, and compare them. If your eyes were the same size then, and now they've change sizes, then you need to see your pcp, and eye doctor for evaluation. Your pcp can do a physical exam, and make sure that your thyroid is normal, and may need to order a thyroid panel. If your eyes haven't changed, and you just noticed it now, that may be less worrisome. Good catch!