So... time for regurge protocol!
Wait 10 days before feeding again. Feeding right away after a regurge can trigger more, which can be very dangerous for the snakes.
For the first offering, offer 1 pinky head. If there is no regurge, wait 7 days and offer another head. If there is a regurge, start over.
After the second head offering, if no regurge wait 7 days and offer another head. If no regurge, wait 7 days and then offer half a pinky, cut lengthwise (do this while it is still frozen, then thaw it). If the snake keeps that down, keep offering half-pinks for 4 to 6 weeks before moving on to slit whole pinks. Once the snakes are keeping whole pinks down, you can decrease the time between feedings if you like, but to no more often than every 5 days.