have u had much movement downstairs? (dont answer if you dont want to).
i find that constipation a few weeks in is a bugger!!! basically if you are constipated your body retains water. this then shows on the scales.
if you need help use the fibre supplement from your cdc, it really does help. BUT do not start using if you are already bunged up, clear that first (with a laxative) then start the fibre. using it whilst constipated will not help but make it worse!
i hope this helps and sorry if tmi for some peeps xxx