I think everybody's body handles weight loss differently. I've been trying to lose weight since the summertime and it seemed like nothing I did helped. Then all of a sudden I dropped 10 lbs in what seemed like no time, but I didn't look any different. It was really disheartening, but I kept on trying to take more weight off.
Then in the last 6 weeks I lost just over 2" each from my bust, waist and hip... but my weight hasn't changed a single pound.
So... my point is, keep trying and don't get frustrated. Weight and inches seem to be two very different things (at least for me), but perseverance will help both decrease in the end. Some people may notice 5lbs, some may not.
Also, our greatest critics are often ourselves. Even though you don't see the changes, others can. Just from your FOTD's, I can see that you've lost weight
Good luck!!