Bad day

It seems I can't do anything right.  Everyone keeps telling me to do things (don't let your son fall,  don't slam the car door,  don't overcook the potatoes) as if I'm stupid or something.  It's really frustrating.  I already feel so worthless and now this too.  But, I've been keeping busy with work - it's one area where nobody I know can tell me what to do because I am an expert at it.  If only I could be an expert at feeling better too. :-(