Best expressed through the words of A A Milne:
"Piglet?" said Pooh. "Yes Pooh?" said Piglet. "Do you ever have days when everything feels... Not Very Okay At All? And sometimes you don't even know why you feel Not Very Okay At All, you just know that you do." Piglet nodded his head sagely. "Oh yes," said Piglet. "I definitely have those days." "Really?" said Pooh in surprise. "I would never have thought that. You always seem so happy and like you have got everything in life all sorted out." "Ah," said Piglet. "Well here's the thing. There are two things that you need to know, Pooh. The first thing is that even those pigs, and bears, and people, who seem to have got everything in life all sorted out... they probably haven't. Actually, everyone has days when they feel Not Very Okay At All. Some people are just better at hiding it than others. "And the second thing you need to know... is that it's okay to feel Not Very Okay At All. It can be quite normal, in fact. And all you need to do, on those days when you feel Not Very Okay At All, is come and find me, and tell me. Don't ever feel like you have to hide the fact you're feeling Not Very Okay At All. Always come and tell me. Because I will always be there."