Was that my Period?

So my cycle started Thursday, which is two days late for me and the first two days it was very light and regular at the end. I've also had the flu. Long story short, Saturday i started to have some serious nausea and vomiting. It's now day three of puke-tasticness and I don't know what the hell is going on. I've been preggo twice and i know this feeling but usually it's with a missed period. Any one else ever had a period while pregnant?