Oh ! Thank you very much for all your replies

I know she supposed to pant when nursing but what concerned me is that she pants during the night when she is not nursing, she is laying on the floor and just breathes heavily, and it is only during the night and by 4/5am she stops. But then again, I think its normal, maybe it is the uterus contracting in order to get to normal etc as the room is not too warm for her so I cant think of any other reason

. But anyway your replies calmed me down a bit and I am sure she is fine, during the day she is completely fine :)
Once again thank you guys :) !