Losing belly fat?

I use to be skinny to point where you can feel and see my ribs, and my joints. Now i appear to be gaining belly fat. It’s becoming a bit noticeable by my friends and coworkers. I’ve been jogging, planking, and doing cardio exercises for some time, and i still look the same. I don’t know what else to do. With the gyms closed, i don’t know how much more belly fat i may gain. If i stop eating for 3 days, and only eat pieces of bread, will it make a difference? Or is there some kind of supplement? Im just trying to lose this belly fat, to make it less noticeable