Pizza, Purging, and Blood in the sink.

Today I did something I don't normally do.. I ate pizza.  It was just one of those little personal pan pizzas from PizzaHut, but I still feel gross about it.  I had planned to purge it, but then got a phone call and then my dad came home.  So now I'm sitting at work, with a bunch of pizza and MountianDew in my stomach, and I'm not sure what to do next.   Part of me still wants to go lock myself in a bathroom and purge, but part of me wants to force myself to keep it down.  See, I'm quite scared.  Last night after work I went home, locked myself in my room, and plurged.  Then I went to the bathroom to wash up and finish in the sink (it had been a while since I ate and so the stuff was mostly liquid), but when I started to purge, I saw blood in it.  I would start to purge up some clearish stuff and there would be streaks of red blood in it.  I also purged early in the day yesterday, and in the middle of my purging, some of it came out pink.  Some food came out one color, then there was a pink tink to it, then I started purging out the other things I had eaten which were a different color.  I just figured at first it was something I had eaten.. but when I think of it.. I had cocao, and soup, and crackers.  None of this was pink or red.  It was brown or a muted yellowy tan color.  So I wonder if that part in the middle had blood in it as well.   I am trying to not purge today.  I am scared of what is happening, I guess seeing the blood there in the sink makes this all the more real to me.