Puked All Of The Sudden

Tonette
Hi ladies, I'm 12 weeks & 1day today & just a few minutes ago I went to the bathroom to shower all to just find myself throwing up out of nowhere. Since I've known I am pregnant I haven't thrown up at all until today. I have my very first appointment tomorrow & I'm wondering could that have been a sign of twins or could it be from eating something? Also I didn't eat nothing yet today because I've been feeling really sluggish from my trip back home. Anybody experience throwing up out of the blue?