OP - if you aren't happy with the way your body looks, other people, including your DH telling you that your body is gorgeous, will make no difference.
So you have 3 choices, 1) stay as you are, feel bad about the way you look (crap option) 2) stay as you are and find a way to feel good about the way you look or 3) change the way you look.
remember, change is unlikely to get you back to the way you looked pre-DCs, your body has changed, how you carry fat may well have changed.
Do you feel healthy, other than your size? Do you feel you are eating well, and are fit? I found returning to work after DC1 was tricky as I had got used to walking everywhere with the buggy, and it was hard to build exercise into my routine on work days. As others have said, if you work in an office where there's lots of cakes, biscuits etc or lots of lunches out, then you might be eating a lot more than you were at home, and being in an office it's a lot less physical than being at home.
Think about why you aren't happy with your body, and why are you comfort eating - dealing with your need for comfort is easier in the long run than needing it and trying to do self denial.