Is it normal if you lose weight but look heavier?

So far, Ive been going to this fitness class and i really like it cause its an extra push where I can't say no or slack off on top of I cant stop eating food. I refuse to go on a strict diet so I just base it on proportion but I still eat. So now Im eating happier since I go to the class which keeps me working out and Im guessing works my metabolism since Ive been losing weight even though, I look thicker. Sometimes Ill freak out when I see how thick I am so I go weigh myself and Im either the same or less. I dont understand cause before when I would workout by myself, Id lose a little bit of weight but I can see the difference and I looked good but not anymore. Is this normal or how its supposed to be?