blood is tasty n it's like an energy drink for me
Depends how much you consume
In general it's safe. I mean, I wouldn't drink a pint or anything since it seems like it'd be hard to keep down, but your own blood is not normally unhealthy to drink. Drinking someone else's blood is riskier, depending on whether they have diseases.
I dunno haven't tried........
Not from drinking it, but you could get an infection by cutting yourself if you aren't very careful. Also, blood tastes disgusting.
You can become ill from drinking blood. A little is not a very exact amount and how much you could have varies depending on your self. As well if your already ill drinking your own blood will actually make things worse.
what's a little? no you can't in general