Sick - something I ate or pregnant?

Went to bed early, because I have to be up early. Ten minutes later, I suddenly feel sick and head straight to the bathroom. After throwing up my dinner (from hours before) I don't feel sick anymore, but not better either. 
As I'm laying here, hoping to get in 5 hours of sleep AT LEAST, alllllll I can think is that it was pregnancy sickness. 
Obviously I'm being super paranoid, right??

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