Comment by ngd
Sorry to say I'm in almost an identical seat. I broke my thumb and have a gnarly but closed tuft fracture - after 4 weeks I saw a specialist who said there wasn't much healing or bone growth yet, and so decided to do a more aggressive splinting and lock down the whole thumb for another 4 weeks.
Oddly enough I had a similar injury 10 years prior on a different finger and that healed up in 6 weeks as if nothing ever happened to it.