Most of the time, you should tell the voices in your head to shut the hell up.
I am over 85% sure I left the oven on.
Didn’t I bring more kids than this to the mall?
THAT is definitely a lump and I need to get it checked out.
I deserve more “me” time.
Cake makes everything better.
But otherwise, in my admittedly limited experience, the voices in your head, ok, my head, are idiots. Also, they are you. OK, me.
Those voices tend towards the confirmation bias. That is, reinforcing what you already believe to be true about yourself, always in the negative. Or they compare you unfavorably towards other people you know, especially if you particularly admire those people and definitely if you envy them at all.