Recently i stayed at the Fess Parker doubletree in SB for a conference. I had paid $339 / night via the conference website and shared my Hilton Honors number with the hotel. When i checked out the final bill was $0, but didn't show anything else. A few days later i noticed online that i didn't get any points for my 3 nights @ $339.

I'm HH gold, and even got my oceanfront upgrade /letter when i checked in, so i was surpised i didn't see any points.

Since i booked directly through the conference, did i lose out on my ~15k points credit? Any suggestions?