Last night I had what I just assume was food poisoning from something I ate (I am not sure what, though, as my diet was perfectly normal the past few days). I was suffering massive painful cramps and just felt very 'queazy' for a bit, but then threw up and felt fine 5 minutes after. But when I threw up I noticed an unusual a ball (about the size of a pea, maybe a little larger) in the vomit. It had a hard white inside that looked kind of powdery, and just felt very hard with what looked like some yellowish speckles in it. It was also cover in a maybe 3 millimetre thick whitish-clear film. I am wondering if I just somehow missed that something I ate had this inside of it and it just came up with something else my body rejected or if it was something different?