This is pretty basic advice, but it never hurts to remember this. Listen to your body, it will tell you what is best for it if you can free yourself up enough to pay attention. Your health is what is most important, without good health, all the exercise and diet will be pointless.
If you want advice on how to deal with scarring, let me know. My daughter is up on all the latest ways to heal our skin and minimize scaring. She gave me lotions which have almost made the scaring from the prostatectomy I had completely disappear. She also gave me some fancy facial oils for Christmas that seem to be really good for my skin.