Morning sickness with diabetes?

For a couple of years now, I'll wake up in the mornings with nausea and shakiness. And I usually throw-up, it's not food or anything I've eaten, it's always just bile or something like that...what causes this? When I check my glucose levels, they've ranged from 100s to 250s - it's never only if they are too high or too low, never consistent. What is causing this, I usually feel about 75% better after throwing up - then gradually start the improve as the day goes on. I inject of 50units of lantus in am, sliding scale of novolog after each meal, and 50units of lantus at bedtime. thanks for your help!!