I'm sorry hun, I really have no education to answer that question. I know I have heard that when you hit a plateu you need to shake things up a bit, mainly in the way of excersize, maybe excersize a bit more, or change the time of day you excersize. If your doing 45 min's of excersize in a row, maybe you can do 2 30 min sets instead to help increase the amt of time?
I've also heard of people having like, 1600 cals for a few days, then 1200 cals for a few days its SUPPOSED to confuse your body and prevent plateus...but like I said, I really can't speak w/ any authority on the matter.....I really dont' know what else to say....how many cals are you consuming on a daily basis??