Give it a little longer, it really does work. Some weeks are slower than others and there's no explaining what does or doesn't impact on it. For me, I have great weeks and then the week after TOTM my weight loss is shockingly low - its happened twice now!! Most people have that drop in the week leading it, but not me! At least I saw the trend. The first time it was my week 3 WI and that seems to be low for lots of people, but I was watching it for the next time and sure enough really low again. I don't think I retain water, never had bloating or anything like that - in fact bar a few niggly cramps, never have any symptons at all, so this is a real eye-opener for me.
I did this before and I didn't track the trends as closely then, but every so often for no good reason, I'd have this really low weight-loss - looking back I wonder if same thing, but I do remember it being depressing that time!!!!
I know you've put in a massive effort, but look at it a different way, could you have lost that much weight with anything else??
And my final comment. I weigh myself every single day, which is not recommended and I know it, but anyway I do it!!!! But I have noticed that after the first week, most days there is little or no change and then one day there is a 2lb drop (or something like that). But all the days when you've been so good and the scales doesn't move - it is disheartening!! The best advice is to try to wait for the official WI only, but seeing as I don't it, I feel a hypocrite saying it to you!!
If you an stick it, the results do come and they're amazing!!