The chance that you could develop bacterial endocarditis
is extremely high. From there, you could have severe damage to your heart valves - Then, if you're lucky you'll be on IV antibiotics (in the hospital) for about 6 weeks, and if you're really lucky, you can plan for a heart transplant -
I can't guarantee the transplant part, but the Endocarditis is pretty likely, and the IV treatment is common.
It's not worth it.