Depressed Momma

Its been 14 months since i gave birth and ive put on a lot of weight. i did in fact lose a lot of weight right after birth but was unable to control my junk food and sweet drinks intake to get me thru the day. i feel so depressed looking at myself now. i feel like a loser because i just recently tried home exercises but it seems to be failing because I need to juggle carrying for my child who wants me all the time. i also cant seem to find time after work to do it because i feel so exhausted and i still have so many things to do(housework,cooking etc) How do you mummies juggle the new being a first time mummy yet still look so good and healthy?