Losing weight

Anyone know of a good way to lose weight before I got pregnant in 2013 I weighed 115-120 lbs. During pregnancy I gained 85 lbs and not until the last part of my pregnancy. I was gaining 10-15 each month I didn't eat bad either I even kept a food diary for the doctor. I now weigh 175 lbs bc I gained back some weight I lost due to depo and nexplanon. I am having a hard time losing weight on my own so any opinions or tips would help. And not any food diets bc I'm not that disciplined to stay on a diet. Workouts would be ideal for me. Thanks. Here's a pic before pregnancy and about 35 weeks pregnant. I weighed 195 lbs when she was born