When you are upset or sad and your baby senses that something is bothering you, don't tell them "mommy is fine" because they may learn to doubt their instincts. Try asking them "can you give me a hug to help make mommy feel better?" or something like that.

Nobody is perfect and you are bound to get upset or sad in front of your child, you are human. It is important for a child to learn to trust there gut in case they are put in a situation later on in there life. Teach them to trust their gut now, and hopefully it well help them later on down the road.