Same boat. Currently at 29 nights on 9 stays already. Have stays booked until mid-April that will bring me to 47 nights on 14 stays. 11 fall in the promo period I think (I have a stay that is a check-in on 3/31 and check out on 4/3, so I think all three nights count....)

This will definitely be the earliest I have re-qual'd for Diamond by far. Been a very heavy early travel year for me. Always comes in bursts, just so happened the burst was at the beginning of the year this time. Not entirely sure I'll get more nights before the promo ends or not. Have 2x one night award stays coming up at 5k per night. Not sure it is worth switching over to C+P if it is even available.