Wow when God speaks I listen

OK, so everyone knows I am doing this challenge thing diet, exercise which should equal life change. Well I have been exercising every day, keeping my food journal, eating foods that are good for me, not eating after 9pm. Honestly I am barely eating the calories they gave me to eat, they actually told me I was not eating enough. SO I went to the weigh in last Thursday evening after a long day of work and their scale said I gained 1 lb. I was devastated. I thought I am killing my self with all of this and I gained a pound! I thought what is the use. I know my blood sugars have been better but I wanted poundage lost, ya know! SO I continued on with my Friday. I worked in the hospital and literally ran all day. I was exhausted after that so I went home, ate dinner and actually feel asleep in front of the computer taking my test for my classes I am taking.
Saturday, was Access, an all day seminar at the church. I registered but did not want to go. I got up the next morning and still did not want to go. I got dressed and went. Ten minutes into the program I felt like I had a spotlight on me and Cal, our preacher, was speaking directly to me. He actually spoke about how exercise is good for you! I was blown away! As the day went on several other references to diet and exercise came as the preacher and other teachers emphasised we should take care of the "temple of the Lord Jesus Christ". I cried all day. (Thank goodness I did not put make up on because it would have been a waste of time.) I went to see my dad for his birthday at Myrtle Beach after Access. I talked to him and my step mom about it, but did not exercise, just spent the evening relaxing with my dad. The next morning I went to church with them. Don't you know the message was basically the same thing! This preacher used different circumstances but it was basically the same message. One of the verses for the message was Philippians 1:6 He who began a good work in you will perfect it until the day of Christ Jesus. I totally got the message. After church I went for a walk and praised God for everything and for letting me know this is truly what He wants me to do. I walked about 45 min to 1 hour as my trainer told me and later my step mom and I walked again on the beach.
SO I know this is what the Lord wants me to do and I know I can not do it. I have tried many times in the past and failed. Now its God's turn and I have to have faith and follow the rules.