I am weary from groaning; with my tears I dampen my pillow and drench my bed every night.
I really relate to this psalm. There was a time in my life that I was in a depression, weary by some circumstances, barely able to sleep, gained weight, anxiety, and many other things that were draining my life. The worst part is that sometimes we feel that God is not near us or He has forgotten us.
David, the psalmist, cries out to God with honesty and says: "Have compassion for me," he turns his feelings to God. Then with great faith, he says: "The Lord has heard the sound of my weeping." He knew that the Almighty would take care of him.
In the science world, there is a concept known as neuroplasticity. This basically means that our brain can re-wire itself and adapt based on positive influence based on emotions and thoughts. This been clinically proven. What an excellent opportunity to let the Holy Spirit do his work and fill us with his warm presence.
As believers, we need to understand we are not immune to hardship. If we develop and mimic a relationship like the one David had with God, we should be able to pour our feelings and concerns to God. He knows your concerns, what's best for you and the best of all, He is a full of mercy!