other than the fact that the female has been breeding, is there any other evidence that will tell you that the shed is a pre egg lay shed?

i have a female that is now in shed but has been bred only twice so far. could this be her pre-egg lay shed?? should i start counting the days to eggs while attempting to breed her just to be safe? and does the 25-37 day countdown start at the beginning of a shed cycle or after the old skin has been shed off?