{{{{{{{{{{{{{{Ladybug}}}}}}}}}}}}}}}}} We all have those feelings at one time or another. Some of us have them all the time. What I do when I feel stupid for doing something, I try to think of a time I did it right... or I go back and do it again but more carefully the next time, then I tell myself how smart I am and how good I am. Sometimes it sounds dumb to me, but if no one is going to tell me those things, then I have to do it for myself.
Didn't I read a post where someone suggested you read some self-help books on Cognitive Behavior Modification? Do it!

You'll be surprised at how your outlook changes.
I know there's some great posts here in that subject. Let me do a search and then I'll post the links to them.
<font color=blue>"Our doubts are traitors and make us lose the good we oft might win by fearing to attempt" --Shakespeare</font color=blue>
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.