Desperately seeking advice...

I know, I am actually asking for advice from everyone I can find, so here is the problem...

L has gotten into the habit of sucking his fingers. First it was his thumb, now it is his right index finger. Yes, he has a bit of an oral fixation and this started after we took the pacifier away, but now that it is gone there isn't a chance in hell that I am giving it back. Now, beyond the whole -- plays in the dirt one second, sucking on his dirty finger the next I have a bigger problem.

A cut.

At some point last week L got a small cut on his finger. Well, with the finger constantly in his mouth -- trust me, we correct him EVERY time we see it, but I can only imagine he sleeps with it in his mouth and I am not on top of him 24 hours a day -- it seems to maybe be getting infected. I put Bacitracin on it yesterday because I know that is ok to ingest (it is part of the all purpose nipple cream for those of you who are wondering how I came across the ok to ingest conclusion). But I can't put a band aid on it -- he rips it off instantly -- and I don't know how to keep it out of his mouth.

I am keeping a close eye on it and I am guessing we will be making a trip to the pedi about this before Thanksgiving, but how to I keep this from being a constant problem?