Well so far all signs are pointing to a blood clot in his lungs. His oxygen is low, heart rate high and something showing up in his blood count. He is weak. We are now waiting for the stuff you need to drink for a CAT scan
Same exact thing with my dad. They said it was either a blood clot or cancer and it was just this really hard fluid and they did surgery and get "some" of it out. He also developed diabetes from this, I forgot to mention.