First of all let me start out by saying that I am not a certified trainer. I do exercise on a regular basis and I have for many years. I have read some of the replies and they offer some great advise. First I would consult a doctor. If you work around doctors, make casual conversation with one that shows an interest in health. I know that he/she would be more than happy to help. Also, it sounds to me that maybe you started out to hard. Our brain thinks that we are still 20 but our body knows better. Take it slow and work your way up. Write it down so you can see your progress. Surround yourself with people that support you or may have a goal of losing weight too. Find a partner or group that you can exercise with. If you can get past the first few weeks (which are the toughest) of a healthy lifestyle, you are on your way. If you choose a personal trainer, make sure it is one that is not going to work you to death. I have seen so many people come to the gym and never come back because they are in so much pain from starting out too hard. Good luck and let us know about your progress.