Morning sickness- timing induced?

Melanie
Does anyone know if the time you wake up in the morning can prompt morning sickness? I am 17 weeks and still getting sick. In the first trimester I was getting sick all day like 5 times a day. Thankfully now it's normally just in the morning. I've noticed, however, that if I wake up after 8am I normally won't get sick. Problem is, I wake up for work between 5 & 5:30 during the week so I'm always getting sick. 
Any thoughts on waking up so early causing morning sickness? I know it sounds stupid and I can't find anything on Google to say that just wondering if anyone is having similar experiences.