You're not alone Fubar...
The blood... oh.. THE BLOOD...!
All I can suggest is do not try and have sex or attempt to knock one out by yourself until it has fully healed. It will just start the process all over again. Oh the blood...!
Involuntary erections can be dangerous also, just try and think about your parents having sex or something to get rid of it..
In the early stages of healing even a hard on can tear it again. I feel your pain brother. I think it was about 2 weeks before I attempted to use the fella again when it ripped again, not as severe as the original but still the blood and having to start healing again which took another 2 weeks to heal completely. If I hadn't been impatient I think 3 weeks tops and I'd of been good to go, probably 2.5 weeks..
The good news is that once it's healed you'd never know and your penis forgives you..