I need some encouragement!

Hi, all-I'm not a newbie, but trying to get more serious about losing weight. I lost 25 lbs, wasn't down to my goal, but looking ok & getting lots of compliments......the had some surgery, & dang if I'm not up 12 lbs. Just got back to the gym last week. I need to lose this 12 lbs so I can fit into my wedding dress on October 15th!!!