Good for
you in your desire and efforts to get fitter and healthier!
Yes,
weight can fluctuate as much as 3-4 pounds in a 24 hour period, more right
before your menses. It is best to weigh at the same time of day to most
accurately assess how you are doing and remember that muscle weight is more
than fat weight, so you may not see a drop in weight though you are getting
more muscle tone and strength.