Am i doing enough exercise for my diet?

Well, i started working out and eating heathier about a months and 2 day ago. On the 3rd week i weighed myself and i had lost 4lb. The exercise that i do is : i walk and stand around 5-8hrs 5 days a week for work, 3 times a week i do swmming arobic, and swim (laps) for 45min-1hr. And every night i do 4 sets of 15 crunches, 30 squats, 20 lunges 20 sit jumps or w/e u call them, where u go down to the ground and jump up, and i work my arms with onelb weights 2 sets of 15 for each arm workout i do. I know u shudnt work one the same muscle everyday...but idk how to spread it out.....so am i doing enough, and how can i spread out my exercise so it will be mor benificial?