day 2- 30 day shred

Yesterday I did day 2 of the 30 day shred. I felt like I was going to die. A lot of my msucle hurt from the previous day, but I am going to follow the plan to see how it goes. I really want to know if this is worth sticking with or not. I am hoping to get a chance to do day 3 today but am not sure how today or the rest of the weekend will go. But If I can lose 20 lbs in 30 days, I will accept it and try my hardest to finish the program. I am sore today, and not sure if my body will hold up for day 3. My arms and legs were shaking after the workout. I also had to stop during push ups because my arms couldn't take anymore!