I am sorry my love I only just saw this thread. I am very sad to read of the loss of your son - you have been through such a painful & heartwrenching time...
It is not unusual at all for things to be out of whack post birth. However if things soon don't get on track I would consult with your obstetrician just to check things out.
I understand well the need to fill your empty arms. I hope that soon you are blessed with your forever baby...