I have currently booked a trip from MDW-MCI for December 4 and it is booked with Points and I have Early Bird on it already so I can't cancel without forfeiting the EB Payment. So my question is, is it possible to change my booking for this to MCI-DAL For February 8 or DAL-MCI for Feb 11 or 12. (when reservations come online) without losing my EB or not?

The reason why I asked is because I found a cheaper rate for an earlier departure on a different service and that WN did not drop any $49 fares in the afternoon or evening buckets during the sale for the MDW-MCI route on the 4th.