The previous poster has asked you a good question. Are you tracking your food and staying in your recommended calorie and nutrient ranges? The majority of your weight loss progress is going to come from diet, not exercise. Do you measure yourself? Have you lost inches?
Any change in your exercise routine can result in temporary water weight gain, but most of that should go away by the 6 week mark. Are you doing any cardio exercise or just strength training?
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford