Vomiting without nausea?

Jodie
I'm 10 weeks tomorrow and thought I'd escaped the dreaded 'morning sickness' - However I woke up at 3 this morning, couldn't get back to sleep but felt fine, then all of a sudden started retching and had to run to the bathroom to be sick. Could this be MS or something else? Is it more normal to feel nauseous before you're sick?