I have been OP'ing for about 2 months now. My gums do bleed a tiny bit, but I had attributed it to the firm toothbrush that I am using (it said soft bristle, that's why I bought it, but it's not!)
As for the puke smell - it is most likely toxins. Every once in a while I smell it too, in fact, I go around the house asking my family if they can smell it! No one else ever does, just me - so I figured it was a detox thing.