Chummy, yes it is actually normal at that time. I also find that when I go onto liquids and mash post fill my weight loss normally slows right down (although for a lot of people they tend to lose a couple of extra lbs) it doesn't work that way for me. In fact after my fill last week and being on mash and liquids, I've actually put on 3lb!
Weight can fluctuate naturally, things such as time of the month, even within a 24 hour period, so trying to take a wider view of the losses is important, but its still hard when it may not drop as we hoped, or if it goes in the other direction, or indeed up and down over the same few pound.