its not the barfing thatll get you.
Its the multiplying bacteria that will "fester" (love that word) in your mouth, throat, and stomach, multiplying rapidly causing all kinds of untold agony (and possibly, but hardly ever) death.
Its the other end of you id watch out for. Food poisoning is expelled through your usual canals.... just at a faster rate
FYI if your pregnant can i suggest not eating microwaved food? Or risking your health in anyway just for a pizza