I hate my body :( pic attached

I really really hate my body... my wee girl is 4 years old I went from a size 8 til near a 14/16... my sister took a photo yesterday and I look like a whale in it... its making me so down :( I don't feel attractive and it's starting to take its tole on my relationship .. I try to loose weight but I can't and I don't know how to dress myself to suit this weight please help