Your feelings are the way in which our subconscious mind really communicates with you. If your thoughts make you feel not so good about yourself, those thoughts need to be re-wired.
Once you have identified a few thought patterns that are no longer serving you, instead of getting caught up with them, change them. There is always a way to change these thoughts into ones that uplift and make you feel good.
"I can't do this because….."
Change it to:
"I am going to use my strengths and focus on what I can do rather than what I can't do."