uggh!

I don't know what I'm doing wrong! I have been sold out to this whole eating healthy and working out routine for over 2 weeks now, and it seems to keep back firing! I just don't get it!... It seems like no matter what i do, i keep gaining weight. I cut out pop, sugary juice, fast food, switched to FF milk, i eat yogurt for breakfast, and have healthy soup for lunch, cut out snacking, work out 3 times a week, and I'm still gaining weight! This is so unbelievably frustrating... i don't know what to do any more...