Okay so I am an IV oxymorphone user for about a month now.. I've been doing about one g77 30mg opana ER per 2 days (half a day) for about 2 weeks now, using the 91% isopryl extraction method. Recently I just IVed today around 2:30pm on a total empty stomach and by 3:00pm I was feeling extremely nauseous and had to run to the bathroom to puke.. After I was about done vomiting, I vomited up some blood. Now this really frightened me, considering the fact that how harmful these opana ER's are to inject.. I don't know if I should go see a doctor to get blood work done or not, as all nausea has subsided. I'm very frightened, can anyone please help or give some advice on what to do?