With all the recent changes in the
body, it may just be a temporary issue. Hormonal problems can cause weight gain, water retention, etc. So don't sweat it out unless a couple months have passed and there are no changes.
Otherwise, you might check how many calories you're consuming. You may be cutting too much or eating a tad over what's necessary. I tend to think this is just a temporary issue, however. You dropped 4 lbs in two weeks already. The rest will come with time.