Be patient and sensible with weight loss. Losing too much too soon can have some bad results.
Did the unwanted weight appear all of a sudden overnight? No, it happened over a period of time because of inactivity and overeating the wrong foods, so it stands to reason that to lose it sensibly it will take your body time to adjust to the changes you are placing upon it.
It is not unusual to gain a few pounds in the colder months, so don't panic, just keep active, eat and SLEEP wisely and the results will come.

This is not a weight loss trend you're talking about, this is a "life style change" for life!