Cant help but be annoyed about my weight?

okay so ive lost 12kgs as of this week about to be 13kgs. ive got 5 more kgs to lose to get to my goal weight that would be 68kgs and and probs 4 more kgs so that would make me 64kgs to get to my weight i wanna be that would be smaller than i was before i got pregnant , my son is about 6 and half months old . I weighted about 66kgs or 67kgs before i got pregnant . right now i weigh 74kgs im 5 foot 10 i know its overweigh not happy about it its getting me down !!! but anyways my question is when will people start to notice my weight loss i mean noone has notice or comment on my weigh loss and its making me think ive lost nothing at all !! :( can anyone please tell me where you lose weigh first ? thanks guys